diff --git a/src/app/Http/Controllers/API/V4/Admin/DomainsController.php b/src/app/Http/Controllers/API/V4/Admin/DomainsController.php
--- a/src/app/Http/Controllers/API/V4/Admin/DomainsController.php
+++ b/src/app/Http/Controllers/API/V4/Admin/DomainsController.php
@@ -11,7 +11,7 @@
     /**
      * Remove the specified domain.
      *
-     * @param int $id Domain identifier
+     * @param string $id Domain identifier
      *
      * @return \Illuminate\Http\JsonResponse
      */
diff --git a/src/app/Http/Controllers/API/V4/Admin/UsersController.php b/src/app/Http/Controllers/API/V4/Admin/UsersController.php
--- a/src/app/Http/Controllers/API/V4/Admin/UsersController.php
+++ b/src/app/Http/Controllers/API/V4/Admin/UsersController.php
@@ -14,7 +14,7 @@
     /**
      * Delete a user.
      *
-     * @param int $id User identifier
+     * @param string $id User identifier
      *
      * @return \Illuminate\Http\JsonResponse The response
      */
@@ -227,44 +227,6 @@
     }
 
     /**
-     * Display information on the user account specified by $id.
-     *
-     * @param int $id The account to show information for.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function show($id)
-    {
-        $user = User::find($id);
-
-        if (!$this->checkTenant($user)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($user)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->userResponse($user);
-
-        // Simplified Entitlement/SKU information,
-        // TODO: I agree this format may need to be extended in future
-        $response['skus'] = [];
-        foreach ($user->entitlements as $ent) {
-            $sku = $ent->sku;
-            if (!isset($response['skus'][$sku->id])) {
-                $response['skus'][$sku->id] = ['costs' => [], 'count' => 0];
-            }
-            $response['skus'][$sku->id]['count']++;
-            $response['skus'][$sku->id]['costs'][] = $ent->cost;
-        }
-
-        $response['config'] = $user->getConfig();
-
-        return response()->json($response);
-    }
-
-    /**
      * Create a new user record.
      *
      * @param \Illuminate\Http\Request $request The API request.
diff --git a/src/app/Http/Controllers/API/V4/DomainsController.php b/src/app/Http/Controllers/API/V4/DomainsController.php
--- a/src/app/Http/Controllers/API/V4/DomainsController.php
+++ b/src/app/Http/Controllers/API/V4/DomainsController.php
@@ -3,48 +3,30 @@
 namespace App\Http\Controllers\API\V4;
 
 use App\Domain;
-use App\Http\Controllers\Controller;
+use App\Http\Controllers\RelationController;
 use App\Backends\LDAP;
 use App\Rules\UserEmailDomain;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Validator;
 
-class DomainsController extends Controller
+class DomainsController extends RelationController
 {
-    /** @var array Common object properties in the API response */
-    protected static $objectProps = ['namespace', 'type'];
+    /** @var string Resource localization label */
+    protected $label = 'domain';
 
+    /** @var string Resource model name */
+    protected $model = Domain::class;
 
-    /**
-     * Return a list of domains owned by the current user
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function index()
-    {
-        $user = $this->guard()->user();
+    /** @var array Common object properties in the API response */
+    protected $objectProps = ['namespace', 'type'];
 
-        $list = $user->domains(true, false)
-            ->orderBy('namespace')
-            ->get()
-            ->map(function ($domain) {
-                return $this->objectToClient($domain);
-            })
-            ->all();
+    /** @var array Resource listing order (column names) */
+    protected $order = ['namespace'];
 
-        return response()->json($list);
-    }
+    /** @var array Resource relation method arguments */
+    protected $relationArgs = [true, false];
 
-    /**
-     * Show the form for creating a new domain.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function create()
-    {
-        return $this->errorResponse(404);
-    }
 
     /**
      * Confirm ownership of the specified domain (via DNS check).
@@ -82,7 +64,7 @@
     /**
      * Remove the specified domain.
      *
-     * @param int $id Domain identifier
+     * @param string $id Domain identifier
      *
      * @return \Illuminate\Http\JsonResponse
      */
@@ -113,50 +95,6 @@
     }
 
     /**
-     * Show the form for editing the specified domain.
-     *
-     * @param int $id Domain identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function edit($id)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Set the domain configuration.
-     *
-     * @param int $id Domain identifier
-     *
-     * @return \Illuminate\Http\JsonResponse|void
-     */
-    public function setConfig($id)
-    {
-        $domain = Domain::find($id);
-
-        if (empty($domain)) {
-            return $this->errorResponse(404);
-        }
-
-        // Only owner (or admin) has access to the domain
-        if (!$this->guard()->user()->canUpdate($domain)) {
-            return $this->errorResponse(403);
-        }
-
-        $errors = $domain->setConfig(request()->input());
-
-        if (!empty($errors)) {
-            return response()->json(['status' => 'error', 'errors' => $errors], 422);
-        }
-
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.domain-setconfig-success'),
-        ]);
-    }
-
-    /**
      * Create a domain.
      *
      * @param \Illuminate\Http\Request $request
@@ -234,7 +172,7 @@
     /**
      * Get the information about the specified domain.
      *
-     * @param int $id Domain identifier
+     * @param string $id Domain identifier
      *
      * @return \Illuminate\Http\JsonResponse|void
      */
@@ -282,44 +220,6 @@
     }
 
     /**
-     * Fetch domain status (and reload setup process)
-     *
-     * @param int $id Domain identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function status($id)
-    {
-        $domain = Domain::find($id);
-
-        if (!$this->checkTenant($domain)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($domain)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->processStateUpdate($domain);
-        $response = array_merge($response, self::objectState($domain));
-
-        return response()->json($response);
-    }
-
-    /**
-     * Update the specified domain.
-     *
-     * @param \Illuminate\Http\Request $request
-     * @param int                      $id Domain identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function update(Request $request, $id)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
      * Provide DNS MX information to configure specified domain for
      */
     protected static function getMXConfig(string $namespace): array
@@ -387,7 +287,7 @@
      *
      * @return array Statuses array
      */
-    protected static function objectState(Domain $domain): array
+    protected static function objectState($domain): array
     {
         return [
             'isLdapReady' => $domain->isLdapReady(),
@@ -406,7 +306,7 @@
      *
      * @return array Status information
      */
-    public static function statusInfo(Domain $domain): array
+    public static function statusInfo($domain): array
     {
         // If that is not a public domain, add domain specific steps
         return self::processStateInfo(
diff --git a/src/app/Http/Controllers/API/V4/GroupsController.php b/src/app/Http/Controllers/API/V4/GroupsController.php
--- a/src/app/Http/Controllers/API/V4/GroupsController.php
+++ b/src/app/Http/Controllers/API/V4/GroupsController.php
@@ -2,7 +2,7 @@
 
 namespace App\Http\Controllers\API\V4;
 
-use App\Http\Controllers\Controller;
+use App\Http\Controllers\RelationController;
 use App\Domain;
 use App\Group;
 use App\Rules\GroupName;
@@ -11,164 +11,20 @@
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Validator;
 
-class GroupsController extends Controller
+class GroupsController extends RelationController
 {
-    /** @var array Common object properties in the API response */
-    protected static $objectProps = ['email', 'name'];
-
-
-    /**
-     * Show the form for creating a new group.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function create()
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Delete a group.
-     *
-     * @param int $id Group identifier
-     *
-     * @return \Illuminate\Http\JsonResponse The response
-     */
-    public function destroy($id)
-    {
-        $group = Group::find($id);
-
-        if (!$this->checkTenant($group)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canDelete($group)) {
-            return $this->errorResponse(403);
-        }
-
-        $group->delete();
-
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.distlist-delete-success'),
-        ]);
-    }
-
-    /**
-     * Show the form for editing the specified group.
-     *
-     * @param int $id Group identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function edit($id)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Listing of groups belonging to the authenticated user.
-     *
-     * The group-entitlements billed to the current user wallet(s)
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function index()
-    {
-        $user = $this->guard()->user();
-
-        $result = $user->groups()->orderBy('name')->orderBy('email')->get()
-            ->map(function ($group) {
-                return $this->objectToClient($group);
-            });
-
-        return response()->json($result);
-    }
-
-    /**
-     * Set the group configuration.
-     *
-     * @param int $id Group identifier
-     *
-     * @return \Illuminate\Http\JsonResponse|void
-     */
-    public function setConfig($id)
-    {
-        $group = Group::find($id);
-
-        if (!$this->checkTenant($group)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canUpdate($group)) {
-            return $this->errorResponse(403);
-        }
-
-        $errors = $group->setConfig(request()->input());
-
-        if (!empty($errors)) {
-            return response()->json(['status' => 'error', 'errors' => $errors], 422);
-        }
+    /** @var string Resource localization label */
+    protected $label = 'distlist';
 
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.distlist-setconfig-success'),
-        ]);
-    }
+    /** @var string Resource model name */
+    protected $model = Group::class;
 
-    /**
-     * Display information of a group specified by $id.
-     *
-     * @param int $id The group to show information for.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function show($id)
-    {
-        $group = Group::find($id);
+    /** @var array Resource listing order (column names) */
+    protected $order = ['name', 'email'];
 
-        if (!$this->checkTenant($group)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($group)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->objectToClient($group, true);
-
-        $response['statusInfo'] = self::statusInfo($group);
-
-        // Group configuration, e.g. sender_policy
-        $response['config'] = $group->getConfig();
-
-        return response()->json($response);
-    }
-
-    /**
-     * Fetch group status (and reload setup process)
-     *
-     * @param int $id Group identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function status($id)
-    {
-        $group = Group::find($id);
-
-        if (!$this->checkTenant($group)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($group)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->processStateUpdate($group);
-        $response = array_merge($response, self::objectState($group));
+    /** @var array Common object properties in the API response */
+    protected $objectProps = ['email', 'name'];
 
-        return response()->json($response);
-    }
 
     /**
      * Group status (extended) information
@@ -177,7 +33,7 @@
      *
      * @return array Status information
      */
-    public static function statusInfo(Group $group): array
+    public static function statusInfo($group): array
     {
         return self::processStateInfo(
             $group,
@@ -377,7 +233,7 @@
      *
      * @return array Statuses array
      */
-    protected static function objectState(Group $group): array
+    protected static function objectState($group): array
     {
         return [
             'isLdapReady' => $group->isLdapReady(),
diff --git a/src/app/Http/Controllers/API/V4/PackagesController.php b/src/app/Http/Controllers/API/V4/PackagesController.php
--- a/src/app/Http/Controllers/API/V4/PackagesController.php
+++ b/src/app/Http/Controllers/API/V4/PackagesController.php
@@ -3,49 +3,12 @@
 namespace App\Http\Controllers\API\V4;
 
 use App\Package;
-use App\Http\Controllers\Controller;
+use App\Http\Controllers\ResourceController;
 use Illuminate\Http\Request;
 
-class PackagesController extends Controller
+class PackagesController extends ResourceController
 {
     /**
-     * Show the form for creating a new package.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function create()
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Remove the specified package from storage.
-     *
-     * @param int $id Package identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function destroy($id)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Show the form for editing the specified package.
-     *
-     * @param int $id Package identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function edit($id)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
      * Display a listing of packages.
      *
      * @return \Illuminate\Http\JsonResponse
@@ -69,44 +32,4 @@
 
         return response()->json($response);
     }
-
-    /**
-     * Store a newly created package in storage.
-     *
-     * @param \Illuminate\Http\Request $request
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function store(Request $request)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Display the specified package.
-     *
-     * @param int $id Package identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function show($id)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Update the specified package in storage.
-     *
-     * @param \Illuminate\Http\Request $request Request object
-     * @param int                      $id      Package identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function update(Request $request, $id)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
 }
diff --git a/src/app/Http/Controllers/API/V4/ResourcesController.php b/src/app/Http/Controllers/API/V4/ResourcesController.php
--- a/src/app/Http/Controllers/API/V4/ResourcesController.php
+++ b/src/app/Http/Controllers/API/V4/ResourcesController.php
@@ -2,169 +2,43 @@
 
 namespace App\Http\Controllers\API\V4;
 
-use App\Http\Controllers\Controller;
+use App\Http\Controllers\RelationController;
 use App\Resource;
 use App\Rules\ResourceName;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Validator;
 
-class ResourcesController extends Controller
+class ResourcesController extends RelationController
 {
-    /** @var array Common object properties in the API response */
-    protected static $objectProps = ['email', 'name'];
-
-    /**
-     * Show the form for creating a new resource.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function create()
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Delete a resource.
-     *
-     * @param int $id Resource identifier
-     *
-     * @return \Illuminate\Http\JsonResponse The response
-     */
-    public function destroy($id)
-    {
-        $resource = Resource::find($id);
-
-        if (!$this->checkTenant($resource)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canDelete($resource)) {
-            return $this->errorResponse(403);
-        }
-
-        $resource->delete();
-
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.resource-delete-success'),
-        ]);
-    }
-
-    /**
-     * Show the form for editing the specified resource.
-     *
-     * @param int $id Resource identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function edit($id)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Listing of resources belonging to the authenticated user.
-     *
-     * The resource-entitlements billed to the current user wallet(s)
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function index()
-    {
-        $user = $this->guard()->user();
-
-        $result = $user->resources()->orderBy('name')->get()
-            ->map(function (Resource $resource) {
-                return $this->objectToClient($resource);
-            });
-
-        return response()->json($result);
-    }
-
-    /**
-     * Set the resource configuration.
-     *
-     * @param int $id Resource identifier
-     *
-     * @return \Illuminate\Http\JsonResponse|void
-     */
-    public function setConfig($id)
-    {
-        $resource = Resource::find($id);
+    /** @var string Resource localization label */
+    protected $label = 'resource';
 
-        if (!$this->checkTenant($resource)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canUpdate($resource)) {
-            return $this->errorResponse(403);
-        }
+    /** @var string Resource model name */
+    protected $model = Resource::class;
 
-        $errors = $resource->setConfig(request()->input());
+    /** @var array Resource listing order (column names) */
+    protected $order = ['name'];
 
-        if (!empty($errors)) {
-            return response()->json(['status' => 'error', 'errors' => $errors], 422);
-        }
-
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.resource-setconfig-success'),
-        ]);
-    }
-
-    /**
-     * Display information of a resource specified by $id.
-     *
-     * @param int $id Resource identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function show($id)
-    {
-        $resource = Resource::find($id);
-
-        if (!$this->checkTenant($resource)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($resource)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->objectToClient($resource, true);
-
-        $response['statusInfo'] = self::statusInfo($resource);
+    /** @var array Common object properties in the API response */
+    protected $objectProps = ['email', 'name'];
 
-        // Resource configuration, e.g. invitation_policy
-        $response['config'] = $resource->getConfig();
-
-        return response()->json($response);
-    }
 
     /**
-     * Fetch resource status (and reload setup process)
+     * Prepare resource statuses for the UI
      *
-     * @param int $id Resource identifier
+     * @param \App\Resource $resource Resource object
      *
-     * @return \Illuminate\Http\JsonResponse
+     * @return array Statuses array
      */
-    public function status($id)
+    protected static function objectState($resource): array
     {
-        $resource = Resource::find($id);
-
-        if (!$this->checkTenant($resource)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($resource)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->processStateUpdate($resource);
-        $response = array_merge($response, self::objectState($resource));
-
-        return response()->json($response);
+        return [
+            'isLdapReady' => $resource->isLdapReady(),
+            'isImapReady' => $resource->isImapReady(),
+            'isActive' => $resource->isActive(),
+            'isDeleted' => $resource->isDeleted() || $resource->trashed(),
+        ];
     }
 
     /**
@@ -174,7 +48,7 @@
      *
      * @return array Status information
      */
-    public static function statusInfo(Resource $resource): array
+    public static function statusInfo($resource): array
     {
         return self::processStateInfo(
             $resource,
@@ -332,21 +206,4 @@
 
         return false;
     }
-
-    /**
-     * Prepare resource statuses for the UI
-     *
-     * @param \App\Resource $resource Resource object
-     *
-     * @return array Statuses array
-     */
-    protected static function objectState(Resource $resource): array
-    {
-        return [
-            'isLdapReady' => $resource->isLdapReady(),
-            'isImapReady' => $resource->isImapReady(),
-            'isActive' => $resource->isActive(),
-            'isDeleted' => $resource->isDeleted() || $resource->trashed(),
-        ];
-    }
 }
diff --git a/src/app/Http/Controllers/API/V4/SharedFoldersController.php b/src/app/Http/Controllers/API/V4/SharedFoldersController.php
--- a/src/app/Http/Controllers/API/V4/SharedFoldersController.php
+++ b/src/app/Http/Controllers/API/V4/SharedFoldersController.php
@@ -2,7 +2,7 @@
 
 namespace App\Http\Controllers\API\V4;
 
-use App\Http\Controllers\Controller;
+use App\Http\Controllers\RelationController;
 use App\SharedFolder;
 use App\Rules\SharedFolderName;
 use App\Rules\SharedFolderType;
@@ -10,162 +10,36 @@
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Validator;
 
-class SharedFoldersController extends Controller
+class SharedFoldersController extends RelationController
 {
-    /** @var array Common object properties in the API response */
-    protected static $objectProps = ['email', 'name', 'type'];
-
-    /**
-     * Show the form for creating a new shared folder.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function create()
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Delete a shared folder.
-     *
-     * @param int $id Shared folder identifier
-     *
-     * @return \Illuminate\Http\JsonResponse The response
-     */
-    public function destroy($id)
-    {
-        $folder = SharedFolder::find($id);
-
-        if (!$this->checkTenant($folder)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canDelete($folder)) {
-            return $this->errorResponse(403);
-        }
-
-        $folder->delete();
-
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.shared-folder-delete-success'),
-        ]);
-    }
-
-    /**
-     * Show the form for editing the specified shared folder.
-     *
-     * @param int $id Shared folder identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function edit($id)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Listing of a shared folders belonging to the authenticated user.
-     *
-     * The shared-folder entitlements billed to the current user wallet(s)
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function index()
-    {
-        $user = $this->guard()->user();
-
-        $result = $user->sharedFolders()->orderBy('name')->get()
-            ->map(function (SharedFolder $folder) {
-                return $this->objectToClient($folder);
-            });
-
-        return response()->json($result);
-    }
-
-    /**
-     * Set the shared folder configuration.
-     *
-     * @param int $id Shared folder identifier
-     *
-     * @return \Illuminate\Http\JsonResponse|void
-     */
-    public function setConfig($id)
-    {
-        $folder = SharedFolder::find($id);
+    /** @var string Resource localization label */
+    protected $label = 'shared-folder';
 
-        if (!$this->checkTenant($folder)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canUpdate($folder)) {
-            return $this->errorResponse(403);
-        }
+    /** @var string Resource model name */
+    protected $model = SharedFolder::class;
 
-        $errors = $folder->setConfig(request()->input());
+    /** @var array Resource listing order (column names) */
+    protected $order = ['name'];
 
-        if (!empty($errors)) {
-            return response()->json(['status' => 'error', 'errors' => $errors], 422);
-        }
-
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.shared-folder-setconfig-success'),
-        ]);
-    }
-
-    /**
-     * Display information of a shared folder specified by $id.
-     *
-     * @param int $id Shared folder identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function show($id)
-    {
-        $folder = SharedFolder::find($id);
-
-        if (!$this->checkTenant($folder)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($folder)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->objectToClient($folder, true);
-
-        $response['statusInfo'] = self::statusInfo($folder);
+    /** @var array Common object properties in the API response */
+    protected $objectProps = ['email', 'name', 'type'];
 
-        // Shared folder configuration, e.g. acl
-        $response['config'] = $folder->getConfig();
-
-        return response()->json($response);
-    }
 
     /**
-     * Fetch a shared folder status (and reload setup process)
+     * Prepare shared folder statuses for the UI
      *
-     * @param int $id Shared folder identifier
+     * @param \App\SharedFolder $folder Shared folder object
      *
-     * @return \Illuminate\Http\JsonResponse
+     * @return array Statuses array
      */
-    public function status($id)
+    protected static function objectState($folder): array
     {
-        $folder = SharedFolder::find($id);
-
-        if (!$this->checkTenant($folder)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($folder)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->processStateUpdate($folder);
-        $response = array_merge($response, self::objectState($folder));
-
-        return response()->json($response);
+        return [
+            'isLdapReady' => $folder->isLdapReady(),
+            'isImapReady' => $folder->isImapReady(),
+            'isActive' => $folder->isActive(),
+            'isDeleted' => $folder->isDeleted() || $folder->trashed(),
+        ];
     }
 
     /**
@@ -175,7 +49,7 @@
      *
      * @return array Status information
      */
-    public static function statusInfo(SharedFolder $folder): array
+    public static function statusInfo($folder): array
     {
         return self::processStateInfo(
             $folder,
@@ -337,21 +211,4 @@
 
         return false;
     }
-
-    /**
-     * Prepare shared folder statuses for the UI
-     *
-     * @param \App\SharedFolder $folder Shared folder object
-     *
-     * @return array Statuses array
-     */
-    protected static function objectState(SharedFolder $folder): array
-    {
-        return [
-            'isLdapReady' => $folder->isLdapReady(),
-            'isImapReady' => $folder->isImapReady(),
-            'isActive' => $folder->isActive(),
-            'isDeleted' => $folder->isDeleted() || $folder->trashed(),
-        ];
-    }
 }
diff --git a/src/app/Http/Controllers/API/V4/SkusController.php b/src/app/Http/Controllers/API/V4/SkusController.php
--- a/src/app/Http/Controllers/API/V4/SkusController.php
+++ b/src/app/Http/Controllers/API/V4/SkusController.php
@@ -2,37 +2,13 @@
 
 namespace App\Http\Controllers\API\V4;
 
-use App\Http\Controllers\Controller;
+use App\Http\Controllers\ResourceController;
 use App\Sku;
 use Illuminate\Http\Request;
 
-class SkusController extends Controller
+class SkusController extends ResourceController
 {
     /**
-     * Show the form for creating a new sku.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function create()
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Remove the specified sku from storage.
-     *
-     * @param int $id SKU identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function destroy($id)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
      * Get a list of SKUs available to the domain.
      *
      * @param int $id Domain identifier
@@ -55,19 +31,6 @@
     }
 
     /**
-     * Show the form for editing the specified sku.
-     *
-     * @param int $id SKU identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function edit($id)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
      * Get a list of active SKUs.
      *
      * @return \Illuminate\Http\JsonResponse
@@ -93,46 +56,6 @@
     }
 
     /**
-     * Store a newly created sku in storage.
-     *
-     * @param \Illuminate\Http\Request $request
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function store(Request $request)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Display the specified sku.
-     *
-     * @param int $id SKU identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function show($id)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Update the specified sku in storage.
-     *
-     * @param \Illuminate\Http\Request $request Request object
-     * @param int                      $id      SKU identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function update(Request $request, $id)
-    {
-        // TODO
-        return $this->errorResponse(404);
-    }
-
-    /**
      * Get a list of SKUs available to the user.
      *
      * @param int $id User identifier
diff --git a/src/app/Http/Controllers/API/V4/UsersController.php b/src/app/Http/Controllers/API/V4/UsersController.php
--- a/src/app/Http/Controllers/API/V4/UsersController.php
+++ b/src/app/Http/Controllers/API/V4/UsersController.php
@@ -2,7 +2,7 @@
 
 namespace App\Http\Controllers\API\V4;
 
-use App\Http\Controllers\Controller;
+use App\Http\Controllers\RelationController;
 use App\Domain;
 use App\Group;
 use App\Rules\UserEmailDomain;
@@ -14,7 +14,7 @@
 use Illuminate\Support\Facades\Validator;
 use Illuminate\Support\Str;
 
-class UsersController extends Controller
+class UsersController extends RelationController
 {
     /** @const array List of user setting keys available for modification in UI */
     public const USER_SETTINGS = [
@@ -36,37 +36,15 @@
      */
     protected $deleteBeforeCreate;
 
-    /** @var array Common object properties in the API response */
-    protected static $objectProps = ['email'];
-
-
-    /**
-     * Delete a user.
-     *
-     * @param int $id User identifier
-     *
-     * @return \Illuminate\Http\JsonResponse The response
-     */
-    public function destroy($id)
-    {
-        $user = User::withEnvTenantContext()->find($id);
+    /** @var string Resource localization label */
+    protected $label = 'user';
 
-        if (empty($user)) {
-            return $this->errorResponse(404);
-        }
+    /** @var string Resource model name */
+    protected $model = User::class;
 
-        // User can't remove himself until he's the controller
-        if (!$this->guard()->user()->canDelete($user)) {
-            return $this->errorResponse(403);
-        }
+    /** @var array Common object properties in the API response */
+    protected $objectProps = ['email'];
 
-        $user->delete();
-
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.user-delete-success'),
-        ]);
-    }
 
     /**
      * Listing of users.
@@ -130,48 +108,17 @@
     }
 
     /**
-     * Set user config.
-     *
-     * @param int $id The user
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function setConfig($id)
-    {
-        $user = User::find($id);
-
-        if (empty($user)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canUpdate($user)) {
-            return $this->errorResponse(403);
-        }
-
-        $errors = $user->setConfig(request()->input());
-
-        if (!empty($errors)) {
-            return response()->json(['status' => 'error', 'errors' => $errors], 422);
-        }
-
-        return response()->json([
-                'status' => 'success',
-                'message' => \trans('app.user-setconfig-success'),
-        ]);
-    }
-
-    /**
      * Display information on the user account specified by $id.
      *
-     * @param int $id The account to show information for.
+     * @param string $id The account to show information for.
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function show($id)
     {
-        $user = User::withEnvTenantContext()->find($id);
+        $user = User::find($id);
 
-        if (empty($user)) {
+        if (!$this->checkTenant($user)) {
             return $this->errorResponse(404);
         }
 
@@ -188,38 +135,13 @@
     }
 
     /**
-     * Fetch user status (and reload setup process)
-     *
-     * @param int $id User identifier
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function status($id)
-    {
-        $user = User::withEnvTenantContext()->find($id);
-
-        if (empty($user)) {
-            return $this->errorResponse(404);
-        }
-
-        if (!$this->guard()->user()->canRead($user)) {
-            return $this->errorResponse(403);
-        }
-
-        $response = $this->processStateUpdate($user);
-        $response = array_merge($response, self::objectState($user));
-
-        return response()->json($response);
-    }
-
-    /**
      * User status (extended) information
      *
      * @param \App\User $user User object
      *
      * @return array Status information
      */
-    public static function statusInfo(User $user): array
+    public static function statusInfo($user): array
     {
         $process = self::processStateInfo(
             $user,
@@ -452,7 +374,7 @@
      */
     public static function userResponse(User $user): array
     {
-        $response = self::objectToClient($user, true);
+        $response = array_merge($user->toArray(), self::objectState($user));
 
         // Settings
         $response['settings'] = [];
@@ -503,7 +425,7 @@
      *
      * @return array Statuses array
      */
-    protected static function objectState(User $user): array
+    protected static function objectState($user): array
     {
         return [
             'isImapReady' => $user->isImapReady(),
diff --git a/src/app/Http/Controllers/API/V4/WalletsController.php b/src/app/Http/Controllers/API/V4/WalletsController.php
--- a/src/app/Http/Controllers/API/V4/WalletsController.php
+++ b/src/app/Http/Controllers/API/V4/WalletsController.php
@@ -4,7 +4,7 @@
 
 use App\Transaction;
 use App\Wallet;
-use App\Http\Controllers\Controller;
+use App\Http\Controllers\ResourceController;
 use App\Providers\PaymentProvider;
 use Carbon\Carbon;
 use Illuminate\Http\Request;
@@ -12,41 +12,9 @@
 /**
  * API\WalletsController
  */
-class WalletsController extends Controller
+class WalletsController extends ResourceController
 {
     /**
-     * Display a listing of the resource.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function index()
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Show the form for creating a new resource.
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function create()
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Store a newly created resource in storage.
-     *
-     * @param \Illuminate\Http\Request $request
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function store(Request $request)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
      * Return data of the specified wallet.
      *
      * @param string $id A wallet identifier
@@ -77,43 +45,6 @@
     }
 
     /**
-     * Show the form for editing the specified resource.
-     *
-     * @param int $id
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function edit($id)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Update the specified resource in storage.
-     *
-     * @param \Illuminate\Http\Request $request
-     * @param string                   $id
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function update(Request $request, $id)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
-     * Remove the specified resource from storage.
-     *
-     * @param int $id
-     *
-     * @return \Illuminate\Http\JsonResponse
-     */
-    public function destroy($id)
-    {
-        return $this->errorResponse(404);
-    }
-
-    /**
      * Download a receipt in pdf format.
      *
      * @param string $id      Wallet identifier
diff --git a/src/app/Http/Controllers/Controller.php b/src/app/Http/Controllers/Controller.php
--- a/src/app/Http/Controllers/Controller.php
+++ b/src/app/Http/Controllers/Controller.php
@@ -14,9 +14,6 @@
     use DispatchesJobs;
     use ValidatesRequests;
 
-    /** @var array Common object properties in the API response */
-    protected static $objectProps = [];
-
 
     /**
      * Common error response builder for API (JSON) responses
@@ -84,143 +81,4 @@
     {
         return Auth::guard();
     }
-
-    /**
-     * Object status' process information.
-     *
-     * @param object $object The object to process
-     * @param array  $steps  The steps definition
-     *
-     * @return array Process state information
-     */
-    protected static function processStateInfo($object, array $steps): array
-    {
-        $process = [];
-
-        // Create a process check list
-        foreach ($steps as $step_name => $state) {
-            $step = [
-                'label' => $step_name,
-                'title' => \trans("app.process-{$step_name}"),
-            ];
-
-            if (is_array($state)) {
-                $step['link'] = $state[1];
-                $state = $state[0];
-            }
-
-            $step['state'] = $state;
-
-            $process[] = $step;
-        }
-
-        // Add domain specific steps
-        if (method_exists($object, 'domain')) {
-            $domain = $object->domain();
-
-            // If that is not a public domain
-            if ($domain && !$domain->isPublic()) {
-                $domain_status = API\V4\DomainsController::statusInfo($domain);
-                $process = array_merge($process, $domain_status['process']);
-            }
-        }
-
-        $all = count($process);
-        $checked = count(array_filter($process, function ($v) {
-                return $v['state'];
-        }));
-
-        $state = $all === $checked ? 'done' : 'running';
-
-        // After 180 seconds assume the process is in failed state,
-        // this should unlock the Refresh button in the UI
-        if ($all !== $checked && $object->created_at->diffInSeconds(\Carbon\Carbon::now()) > 180) {
-            $state = 'failed';
-        }
-
-        return [
-            'process' => $process,
-            'processState' => $state,
-            'isReady' => $all === $checked,
-        ];
-    }
-
-    /**
-     * Object status' process information update.
-     *
-     * @param object $object The object to process
-     *
-     * @return array Process state information
-     */
-    protected function processStateUpdate($object): array
-    {
-        $response = $this->statusInfo($object); // @phpstan-ignore-line
-
-        if (!empty(request()->input('refresh'))) {
-            $updated = false;
-            $async = false;
-            $last_step = 'none';
-
-            foreach ($response['process'] as $idx => $step) {
-                $last_step = $step['label'];
-
-                if (!$step['state']) {
-                    $exec = $this->execProcessStep($object, $step['label']); // @phpstan-ignore-line
-
-                    if (!$exec) {
-                        if ($exec === null) {
-                            $async = true;
-                        }
-
-                        break;
-                    }
-
-                    $updated = true;
-                }
-            }
-
-            if ($updated) {
-                $response = $this->statusInfo($object); // @phpstan-ignore-line
-            }
-
-            $success = $response['isReady'];
-            $suffix = $success ? 'success' : 'error-' . $last_step;
-
-            $response['status'] = $success ? 'success' : 'error';
-            $response['message'] = \trans('app.process-' . $suffix);
-
-            if ($async && !$success) {
-                $response['processState'] = 'waiting';
-                $response['status'] = 'success';
-                $response['message'] = \trans('app.process-async');
-            }
-        }
-
-        return $response;
-    }
-
-    /**
-     * Prepare an object for the UI.
-     *
-     * @param object $object An object
-     * @param bool   $full   Include all object properties
-     *
-     * @return array Object information
-     */
-    protected static function objectToClient($object, bool $full = false): array
-    {
-        if ($full) {
-            $result = $object->toArray();
-        } else {
-            $result = ['id' => $object->id];
-
-            foreach (static::$objectProps as $prop) {
-                $result[$prop] = $object->{$prop};
-            }
-        }
-
-        $result = array_merge($result, static::objectState($object)); // @phpstan-ignore-line
-
-        return $result;
-    }
 }
diff --git a/src/app/Http/Controllers/RelationController.php b/src/app/Http/Controllers/RelationController.php
new file mode 100644
--- /dev/null
+++ b/src/app/Http/Controllers/RelationController.php
@@ -0,0 +1,335 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Support\Str;
+
+class RelationController extends ResourceController
+{
+    /** @var array Common object properties in the API response */
+    protected $objectProps = [];
+
+    /** @var string Resource localization label */
+    protected $label = '';
+
+    /** @var string Resource model name */
+    protected $model = '';
+
+    /** @var array Resource listing order (column names) */
+    protected $order = [];
+
+    /** @var array Resource relation method arguments */
+    protected $relationArgs = [];
+
+    /**
+     * Delete a resource.
+     *
+     * @param string $id Resource identifier
+     *
+     * @return \Illuminate\Http\JsonResponse The response
+     */
+    public function destroy($id)
+    {
+        $resource = $this->model::find($id);
+
+        if (!$this->checkTenant($resource)) {
+            return $this->errorResponse(404);
+        }
+
+        if (!$this->guard()->user()->canDelete($resource)) {
+            return $this->errorResponse(403);
+        }
+
+        $resource->delete();
+
+        return response()->json([
+                'status' => 'success',
+                'message' => \trans("app.{$this->label}-delete-success"),
+        ]);
+    }
+
+    /**
+     * Listing of resources belonging to the authenticated user.
+     *
+     * The resource entitlements billed to the current user wallet(s)
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function index()
+    {
+        $user = $this->guard()->user();
+
+        $method = Str::plural(\lcfirst(\class_basename($this->model)));
+
+        $query = call_user_func_array([$user, $method], $this->relationArgs);
+
+        if (!empty($this->order)) {
+            foreach ($this->order as $col) {
+                $query->orderBy($col);
+            }
+        }
+
+        $result = $query->get()
+            ->map(function ($resource) {
+                return $this->objectToClient($resource);
+            });
+
+        return response()->json($result);
+    }
+
+    /**
+     * Prepare resource statuses for the UI
+     *
+     * @param object $resource Resource object
+     *
+     * @return array Statuses array
+     */
+    protected static function objectState($resource): array
+    {
+        return [];
+    }
+
+    /**
+     * Prepare a resource object for the UI.
+     *
+     * @param object $object An object
+     * @param bool   $full   Include all object properties
+     *
+     * @return array Object information
+     */
+    protected function objectToClient($object, bool $full = false): array
+    {
+        if ($full) {
+            $result = $object->toArray();
+        } else {
+            $result = ['id' => $object->id];
+
+            foreach ($this->objectProps as $prop) {
+                $result[$prop] = $object->{$prop};
+            }
+        }
+
+        $result = array_merge($result, $this->objectState($object));
+
+        return $result;
+    }
+
+    /**
+     * Object status' process information.
+     *
+     * @param object $object The object to process
+     * @param array  $steps  The steps definition
+     *
+     * @return array Process state information
+     */
+    protected static function processStateInfo($object, array $steps): array
+    {
+        $process = [];
+
+        // Create a process check list
+        foreach ($steps as $step_name => $state) {
+            $step = [
+                'label' => $step_name,
+                'title' => \trans("app.process-{$step_name}"),
+            ];
+
+            if (is_array($state)) {
+                $step['link'] = $state[1];
+                $state = $state[0];
+            }
+
+            $step['state'] = $state;
+
+            $process[] = $step;
+        }
+
+        // Add domain specific steps
+        if (method_exists($object, 'domain')) {
+            $domain = $object->domain();
+
+            // If that is not a public domain
+            if ($domain && !$domain->isPublic()) {
+                $domain_status = API\V4\DomainsController::statusInfo($domain);
+                $process = array_merge($process, $domain_status['process']);
+            }
+        }
+
+        $all = count($process);
+        $checked = count(array_filter($process, function ($v) {
+                return $v['state'];
+        }));
+
+        $state = $all === $checked ? 'done' : 'running';
+
+        // After 180 seconds assume the process is in failed state,
+        // this should unlock the Refresh button in the UI
+        if ($all !== $checked && $object->created_at->diffInSeconds(\Carbon\Carbon::now()) > 180) {
+            $state = 'failed';
+        }
+
+        return [
+            'process' => $process,
+            'processState' => $state,
+            'isReady' => $all === $checked,
+        ];
+    }
+
+    /**
+     * Object status' process information update.
+     *
+     * @param object $object The object to process
+     *
+     * @return array Process state information
+     */
+    protected function processStateUpdate($object): array
+    {
+        $response = $this->statusInfo($object);
+
+        if (!empty(request()->input('refresh'))) {
+            $updated = false;
+            $async = false;
+            $last_step = 'none';
+
+            foreach ($response['process'] as $idx => $step) {
+                $last_step = $step['label'];
+
+                if (!$step['state']) {
+                    $exec = $this->execProcessStep($object, $step['label']); // @phpstan-ignore-line
+
+                    if (!$exec) {
+                        if ($exec === null) {
+                            $async = true;
+                        }
+
+                        break;
+                    }
+
+                    $updated = true;
+                }
+            }
+
+            if ($updated) {
+                $response = $this->statusInfo($object);
+            }
+
+            $success = $response['isReady'];
+            $suffix = $success ? 'success' : 'error-' . $last_step;
+
+            $response['status'] = $success ? 'success' : 'error';
+            $response['message'] = \trans('app.process-' . $suffix);
+
+            if ($async && !$success) {
+                $response['processState'] = 'waiting';
+                $response['status'] = 'success';
+                $response['message'] = \trans('app.process-async');
+            }
+        }
+
+        return $response;
+    }
+
+    /**
+     * Set the resource configuration.
+     *
+     * @param int $id Resource identifier
+     *
+     * @return \Illuminate\Http\JsonResponse|void
+     */
+    public function setConfig($id)
+    {
+        $resource = $this->model::find($id);
+
+        if (!method_exists($this->model, 'setConfig')) {
+            return $this->errorResponse(404);
+        }
+
+        if (!$this->checkTenant($resource)) {
+            return $this->errorResponse(404);
+        }
+
+        if (!$this->guard()->user()->canUpdate($resource)) {
+            return $this->errorResponse(403);
+        }
+
+        $errors = $resource->setConfig(request()->input());
+
+        if (!empty($errors)) {
+            return response()->json(['status' => 'error', 'errors' => $errors], 422);
+        }
+
+        return response()->json([
+                'status' => 'success',
+                'message' => \trans("app.{$this->label}-setconfig-success"),
+        ]);
+    }
+
+    /**
+     * Display information of a resource specified by $id.
+     *
+     * @param string $id The resource to show information for.
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function show($id)
+    {
+        $resource = $this->model::find($id);
+
+        if (!$this->checkTenant($resource)) {
+            return $this->errorResponse(404);
+        }
+
+        if (!$this->guard()->user()->canRead($resource)) {
+            return $this->errorResponse(403);
+        }
+
+        $response = $this->objectToClient($resource, true);
+
+        if (!empty($statusInfo = $this->statusInfo($resource))) {
+            $response['statusInfo'] = $statusInfo;
+        }
+
+        // Resource configuration, e.g. sender_policy, invitation_policy, acl
+        if (method_exists($resource, 'getConfig')) {
+            $response['config'] = $resource->getConfig();
+        }
+
+        return response()->json($response);
+    }
+
+    /**
+     * Fetch resource status (and reload setup process)
+     *
+     * @param int $id Resource identifier
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function status($id)
+    {
+        $resource = $this->model::find($id);
+
+        if (!$this->checkTenant($resource)) {
+            return $this->errorResponse(404);
+        }
+
+        if (!$this->guard()->user()->canRead($resource)) {
+            return $this->errorResponse(403);
+        }
+
+        $response = $this->processStateUpdate($resource);
+        $response = array_merge($response, $this->objectState($resource));
+
+        return response()->json($response);
+    }
+
+    /**
+     * Resource status (extended) information
+     *
+     * @param object $resource Resource object
+     *
+     * @return array Status information
+     */
+    public static function statusInfo($resource): array
+    {
+        return [];
+    }
+}
diff --git a/src/app/Http/Controllers/ResourceController.php b/src/app/Http/Controllers/ResourceController.php
new file mode 100644
--- /dev/null
+++ b/src/app/Http/Controllers/ResourceController.php
@@ -0,0 +1,91 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+class ResourceController extends Controller
+{
+    /**
+     * Show the form for creating a new resource.
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function create()
+    {
+        return $this->errorResponse(404);
+    }
+
+    /**
+     * Delete a resource.
+     *
+     * @param string $id Resource identifier
+     *
+     * @return \Illuminate\Http\JsonResponse The response
+     */
+    public function destroy($id)
+    {
+        return $this->errorResponse(404);
+    }
+
+    /**
+     * Show the form for editing the specified resource.
+     *
+     * @param string $id Resource identifier
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function edit($id)
+    {
+        return $this->errorResponse(404);
+    }
+
+    /**
+     * Listing of resources belonging to the authenticated user.
+     *
+     * The resource entitlements billed to the current user wallet(s)
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function index()
+    {
+        return $this->errorResponse(404);
+    }
+
+    /**
+     * Display information of a resource specified by $id.
+     *
+     * @param string $id The resource to show information for.
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function show($id)
+    {
+        return $this->errorResponse(404);
+    }
+
+    /**
+     * Create a new resource.
+     *
+     * @param \Illuminate\Http\Request $request The API request.
+     *
+     * @return \Illuminate\Http\JsonResponse The response
+     */
+    public function store(Request $request)
+    {
+        return $this->errorResponse(404);
+    }
+
+    /**
+     * Update a resource.
+     *
+     * @param \Illuminate\Http\Request $request The API request.
+     * @param string                   $id      Resource identifier
+     *
+     * @return \Illuminate\Http\JsonResponse The response
+     */
+    public function update(Request $request, $id)
+    {
+        return $this->errorResponse(404);
+    }
+}
diff --git a/src/routes/api.php b/src/routes/api.php
--- a/src/routes/api.php
+++ b/src/routes/api.php
@@ -68,34 +68,34 @@
         Route::get('auth-attempts/{id}/details', 'API\V4\AuthAttemptsController@details');
         Route::get('auth-attempts', 'API\V4\AuthAttemptsController@index');
 
-        Route::apiResource('domains', API\V4\DomainsController::class);
+        Route::apiResource('domains', 'API\V4\DomainsController');
         Route::get('domains/{id}/confirm', 'API\V4\DomainsController@confirm');
         Route::get('domains/{id}/skus', 'API\V4\SkusController@domainSkus');
         Route::get('domains/{id}/status', 'API\V4\DomainsController@status');
         Route::post('domains/{id}/config', 'API\V4\DomainsController@setConfig');
 
-        Route::apiResource('groups', API\V4\GroupsController::class);
+        Route::apiResource('groups', 'API\V4\GroupsController');
         Route::get('groups/{id}/status', 'API\V4\GroupsController@status');
         Route::post('groups/{id}/config', 'API\V4\GroupsController@setConfig');
 
-        Route::apiResource('packages', API\V4\PackagesController::class);
+        Route::apiResource('packages', 'API\V4\PackagesController');
 
-        Route::apiResource('resources', API\V4\ResourcesController::class);
+        Route::apiResource('resources', 'API\V4\ResourcesController');
         Route::get('resources/{id}/status', 'API\V4\ResourcesController@status');
         Route::post('resources/{id}/config', 'API\V4\ResourcesController@setConfig');
 
-        Route::apiResource('shared-folders', API\V4\SharedFoldersController::class);
+        Route::apiResource('shared-folders', 'API\V4\SharedFoldersController');
         Route::get('shared-folders/{id}/status', 'API\V4\SharedFoldersController@status');
         Route::post('shared-folders/{id}/config', 'API\V4\SharedFoldersController@setConfig');
 
-        Route::apiResource('skus', API\V4\SkusController::class);
+        Route::apiResource('skus', 'API\V4\SkusController');
 
-        Route::apiResource('users', API\V4\UsersController::class);
+        Route::apiResource('users', 'API\V4\UsersController');
         Route::post('users/{id}/config', 'API\V4\UsersController@setConfig');
         Route::get('users/{id}/skus', 'API\V4\SkusController@userSkus');
         Route::get('users/{id}/status', 'API\V4\UsersController@status');
 
-        Route::apiResource('wallets', API\V4\WalletsController::class);
+        Route::apiResource('wallets', 'API\V4\WalletsController');
         Route::get('wallets/{id}/transactions', 'API\V4\WalletsController@transactions');
         Route::get('wallets/{id}/receipts', 'API\V4\WalletsController@receipts');
         Route::get('wallets/{id}/receipts/{receipt}', 'API\V4\WalletsController@receiptDownload');
@@ -184,26 +184,26 @@
             'prefix' => $prefix . 'api/v4',
         ],
         function () {
-            Route::apiResource('domains', API\V4\Admin\DomainsController::class);
+            Route::apiResource('domains', 'API\V4\Admin\DomainsController');
             Route::get('domains/{id}/skus', 'API\V4\Admin\SkusController@domainSkus');
             Route::post('domains/{id}/suspend', 'API\V4\Admin\DomainsController@suspend');
             Route::post('domains/{id}/unsuspend', 'API\V4\Admin\DomainsController@unsuspend');
 
-            Route::apiResource('groups', API\V4\Admin\GroupsController::class);
+            Route::apiResource('groups', 'API\V4\Admin\GroupsController');
             Route::post('groups/{id}/suspend', 'API\V4\Admin\GroupsController@suspend');
             Route::post('groups/{id}/unsuspend', 'API\V4\Admin\GroupsController@unsuspend');
 
-            Route::apiResource('resources', API\V4\Admin\ResourcesController::class);
-            Route::apiResource('shared-folders', API\V4\Admin\SharedFoldersController::class);
-            Route::apiResource('skus', API\V4\Admin\SkusController::class);
-            Route::apiResource('users', API\V4\Admin\UsersController::class);
+            Route::apiResource('resources', 'API\V4\Admin\ResourcesController');
+            Route::apiResource('shared-folders', 'API\V4\Admin\SharedFoldersController');
+            Route::apiResource('skus', 'API\V4\Admin\SkusController');
+            Route::apiResource('users', 'API\V4\Admin\UsersController');
             Route::get('users/{id}/discounts', 'API\V4\Reseller\DiscountsController@userDiscounts');
             Route::post('users/{id}/reset2FA', 'API\V4\Admin\UsersController@reset2FA');
             Route::get('users/{id}/skus', 'API\V4\Admin\SkusController@userSkus');
             Route::post('users/{id}/skus/{sku}', 'API\V4\Admin\UsersController@setSku');
             Route::post('users/{id}/suspend', 'API\V4\Admin\UsersController@suspend');
             Route::post('users/{id}/unsuspend', 'API\V4\Admin\UsersController@unsuspend');
-            Route::apiResource('wallets', API\V4\Admin\WalletsController::class);
+            Route::apiResource('wallets', 'API\V4\Admin\WalletsController');
             Route::post('wallets/{id}/one-off', 'API\V4\Admin\WalletsController@oneOff');
             Route::get('wallets/{id}/transactions', 'API\V4\Admin\WalletsController@transactions');
 
@@ -220,16 +220,16 @@
             'prefix' => $prefix . 'api/v4',
         ],
         function () {
-            Route::apiResource('domains', API\V4\Reseller\DomainsController::class);
+            Route::apiResource('domains', 'API\V4\Reseller\DomainsController');
             Route::get('domains/{id}/skus', 'API\V4\Reseller\SkusController@domainSkus');
             Route::post('domains/{id}/suspend', 'API\V4\Reseller\DomainsController@suspend');
             Route::post('domains/{id}/unsuspend', 'API\V4\Reseller\DomainsController@unsuspend');
 
-            Route::apiResource('groups', API\V4\Reseller\GroupsController::class);
+            Route::apiResource('groups', 'API\V4\Reseller\GroupsController');
             Route::post('groups/{id}/suspend', 'API\V4\Reseller\GroupsController@suspend');
             Route::post('groups/{id}/unsuspend', 'API\V4\Reseller\GroupsController@unsuspend');
 
-            Route::apiResource('invitations', API\V4\Reseller\InvitationsController::class);
+            Route::apiResource('invitations', 'API\V4\Reseller\InvitationsController');
             Route::post('invitations/{id}/resend', 'API\V4\Reseller\InvitationsController@resend');
 
             Route::post('payments', 'API\V4\Reseller\PaymentsController@store');
@@ -241,17 +241,17 @@
             Route::get('payments/pending', 'API\V4\Reseller\PaymentsController@payments');
             Route::get('payments/has-pending', 'API\V4\Reseller\PaymentsController@hasPayments');
 
-            Route::apiResource('resources', API\V4\Reseller\ResourcesController::class);
-            Route::apiResource('shared-folders', API\V4\Reseller\SharedFoldersController::class);
-            Route::apiResource('skus', API\V4\Reseller\SkusController::class);
-            Route::apiResource('users', API\V4\Reseller\UsersController::class);
+            Route::apiResource('resources', 'API\V4\Reseller\ResourcesController');
+            Route::apiResource('shared-folders', 'API\V4\Reseller\SharedFoldersController');
+            Route::apiResource('skus', 'API\V4\Reseller\SkusController');
+            Route::apiResource('users', 'API\V4\Reseller\UsersController');
             Route::get('users/{id}/discounts', 'API\V4\Reseller\DiscountsController@userDiscounts');
             Route::post('users/{id}/reset2FA', 'API\V4\Reseller\UsersController@reset2FA');
             Route::get('users/{id}/skus', 'API\V4\Reseller\SkusController@userSkus');
             Route::post('users/{id}/skus/{sku}', 'API\V4\Admin\UsersController@setSku');
             Route::post('users/{id}/suspend', 'API\V4\Reseller\UsersController@suspend');
             Route::post('users/{id}/unsuspend', 'API\V4\Reseller\UsersController@unsuspend');
-            Route::apiResource('wallets', API\V4\Reseller\WalletsController::class);
+            Route::apiResource('wallets', 'API\V4\Reseller\WalletsController');
             Route::post('wallets/{id}/one-off', 'API\V4\Reseller\WalletsController@oneOff');
             Route::get('wallets/{id}/receipts', 'API\V4\Reseller\WalletsController@receipts');
             Route::get('wallets/{id}/receipts/{receipt}', 'API\V4\Reseller\WalletsController@receiptDownload');