diff --git a/src/app/Discount.php b/src/app/Discount.php
--- a/src/app/Discount.php
+++ b/src/app/Discount.php
@@ -2,6 +2,7 @@
 
 namespace App;
 
+use App\Traits\BelongsToTenantTrait;
 use App\Traits\UuidStrKeyTrait;
 use Illuminate\Database\Eloquent\Model;
 use Spatie\Translatable\HasTranslations;
@@ -17,6 +18,7 @@
  */
 class Discount extends Model
 {
+    use BelongsToTenantTrait;
     use HasTranslations;
     use UuidStrKeyTrait;
 
@@ -59,16 +61,6 @@
     }
 
     /**
-     * The tenant for this discount.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function tenant()
-    {
-        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
-    }
-
-    /**
      * List of wallets with this discount assigned.
      *
      * @return \Illuminate\Database\Eloquent\Relations\HasMany
diff --git a/src/app/Domain.php b/src/app/Domain.php
--- a/src/app/Domain.php
+++ b/src/app/Domain.php
@@ -4,6 +4,7 @@
 
 use App\Wallet;
 use App\Traits\UuidIntKeyTrait;
+use App\Traits\BelongsToTenantTrait;
 use App\Traits\DomainConfigTrait;
 use App\Traits\SettingsTrait;
 use Illuminate\Database\Eloquent\Model;
@@ -20,6 +21,7 @@
 class Domain extends Model
 {
     use UuidIntKeyTrait;
+    use BelongsToTenantTrait;
     use DomainConfigTrait;
     use SettingsTrait;
     use SoftDeletes;
@@ -393,16 +395,6 @@
     }
 
     /**
-     * The tenant for this domain.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function tenant()
-    {
-        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
-    }
-
-    /**
      * Unsuspend this domain.
      *
      * The domain is unsuspended through either of the following courses of actions;
diff --git a/src/app/Group.php b/src/app/Group.php
--- a/src/app/Group.php
+++ b/src/app/Group.php
@@ -2,6 +2,7 @@
 
 namespace App;
 
+use App\Traits\BelongsToTenantTrait;
 use App\Traits\UuidIntKeyTrait;
 use App\Wallet;
 use Illuminate\Database\Eloquent\Model;
@@ -18,6 +19,7 @@
  */
 class Group extends Model
 {
+    use BelongsToTenantTrait;
     use UuidIntKeyTrait;
     use SoftDeletes;
 
@@ -251,16 +253,6 @@
     }
 
     /**
-     * The tenant for this group.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function tenant()
-    {
-        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
-    }
-
-    /**
      * Unsuspend this group.
      *
      * @return void
diff --git a/src/app/Observers/DiscountObserver.php b/src/app/Observers/DiscountObserver.php
deleted file mode 100644
--- a/src/app/Observers/DiscountObserver.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-namespace App\Observers;
-
-use App\Discount;
-
-/**
- * This is an observer for the Discount model definition.
- */
-class DiscountObserver
-{
-    /**
-     * Ensure the discount ID is a custom ID (uuid).
-     *
-     * @param \App\Discount $discount The discount object
-     *
-     * @return void
-     */
-    public function creating(Discount $discount): void
-    {
-        $discount->tenant_id = \config('app.tenant_id');
-    }
-}
diff --git a/src/app/Observers/DomainObserver.php b/src/app/Observers/DomainObserver.php
--- a/src/app/Observers/DomainObserver.php
+++ b/src/app/Observers/DomainObserver.php
@@ -19,8 +19,6 @@
         $domain->namespace = \strtolower($domain->namespace);
 
         $domain->status |= Domain::STATUS_NEW;
-
-        $domain->tenant_id = \config('app.tenant_id');
     }
 
     /**
diff --git a/src/app/Observers/GroupObserver.php b/src/app/Observers/GroupObserver.php
--- a/src/app/Observers/GroupObserver.php
+++ b/src/app/Observers/GroupObserver.php
@@ -17,8 +17,6 @@
     public function creating(Group $group): void
     {
         $group->status |= Group::STATUS_NEW | Group::STATUS_ACTIVE;
-
-        $group->tenant_id = \config('app.tenant_id');
     }
 
     /**
diff --git a/src/app/Observers/PackageObserver.php b/src/app/Observers/PackageObserver.php
deleted file mode 100644
--- a/src/app/Observers/PackageObserver.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-namespace App\Observers;
-
-use App\Package;
-
-/**
- * This is an observer for the Package model definition.
- */
-class PackageObserver
-{
-    /**
-     * Handle the "creating" event on an Package.
-     *
-     * @param Package $package The Package being created.
-     *
-     * @return void
-     */
-    public function creating(Package $package)
-    {
-        $package->tenant_id = \config('app.tenant_id');
-    }
-}
diff --git a/src/app/Observers/PlanObserver.php b/src/app/Observers/PlanObserver.php
deleted file mode 100644
--- a/src/app/Observers/PlanObserver.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-
-namespace App\Observers;
-
-use App\Plan;
-
-/**
- * This is an observer for the Plan model definition.
- */
-class PlanObserver
-{
-    /**
-     * Handle the "creating" event on an Plan.
-     *
-     * Ensures that the entry uses a custom ID (uuid).
-     *
-     * @param Plan $plan The Plan being created.
-     *
-     * @return void
-     */
-    public function creating(Plan $plan)
-    {
-        $plan->tenant_id = \config('app.tenant_id');
-    }
-}
diff --git a/src/app/Observers/SignupInvitationObserver.php b/src/app/Observers/SignupInvitationObserver.php
--- a/src/app/Observers/SignupInvitationObserver.php
+++ b/src/app/Observers/SignupInvitationObserver.php
@@ -19,8 +19,6 @@
     public function creating(SI $invitation)
     {
         $invitation->status = SI::STATUS_NEW;
-
-        $invitation->tenant_id = \config('app.tenant_id');
     }
 
     /**
diff --git a/src/app/Observers/SkuObserver.php b/src/app/Observers/SkuObserver.php
deleted file mode 100644
--- a/src/app/Observers/SkuObserver.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-
-namespace App\Observers;
-
-use App\Sku;
-
-class SkuObserver
-{
-    /**
-     * Ensure the SKU ID is a custom ID (uuid).
-     *
-     * @param Sku $sku The SKU object
-     *
-     * @return void
-     */
-    public function creating(Sku $sku)
-    {
-        $sku->tenant_id = \config('app.tenant_id');
-    }
-}
diff --git a/src/app/Observers/UserObserver.php b/src/app/Observers/UserObserver.php
--- a/src/app/Observers/UserObserver.php
+++ b/src/app/Observers/UserObserver.php
@@ -27,8 +27,6 @@
 
         // only users that are not imported get the benefit of the doubt.
         $user->status |= User::STATUS_NEW | User::STATUS_ACTIVE;
-
-        $user->tenant_id = \config('app.tenant_id');
     }
 
     /**
diff --git a/src/app/Package.php b/src/app/Package.php
--- a/src/app/Package.php
+++ b/src/app/Package.php
@@ -2,6 +2,7 @@
 
 namespace App;
 
+use App\Traits\BelongsToTenantTrait;
 use App\Traits\UuidStrKeyTrait;
 use Illuminate\Database\Eloquent\Model;
 use Spatie\Translatable\HasTranslations;
@@ -32,6 +33,7 @@
  */
 class Package extends Model
 {
+    use BelongsToTenantTrait;
     use HasTranslations;
     use UuidStrKeyTrait;
 
@@ -103,14 +105,4 @@
             ['qty']
         );
     }
-
-    /**
-     * The tenant for this package.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function tenant()
-    {
-        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
-    }
 }
diff --git a/src/app/Plan.php b/src/app/Plan.php
--- a/src/app/Plan.php
+++ b/src/app/Plan.php
@@ -2,6 +2,7 @@
 
 namespace App;
 
+use App\Traits\BelongsToTenantTrait;
 use App\Traits\UuidStrKeyTrait;
 use Illuminate\Database\Eloquent\Model;
 use Spatie\Translatable\HasTranslations;
@@ -27,6 +28,7 @@
  */
 class Plan extends Model
 {
+    use BelongsToTenantTrait;
     use HasTranslations;
     use UuidStrKeyTrait;
 
@@ -114,14 +116,4 @@
 
         return false;
     }
-
-    /**
-     * The tenant for this plan.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function tenant()
-    {
-        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
-    }
 }
diff --git a/src/app/Providers/AppServiceProvider.php b/src/app/Providers/AppServiceProvider.php
--- a/src/app/Providers/AppServiceProvider.php
+++ b/src/app/Providers/AppServiceProvider.php
@@ -44,18 +44,14 @@
      */
     public function boot()
     {
-        \App\Discount::observe(\App\Observers\DiscountObserver::class);
         \App\Domain::observe(\App\Observers\DomainObserver::class);
         \App\Entitlement::observe(\App\Observers\EntitlementObserver::class);
         \App\Group::observe(\App\Observers\GroupObserver::class);
         \App\OpenVidu\Connection::observe(\App\Observers\OpenVidu\ConnectionObserver::class);
-        \App\Package::observe(\App\Observers\PackageObserver::class);
         \App\PackageSku::observe(\App\Observers\PackageSkuObserver::class);
-        \App\Plan::observe(\App\Observers\PlanObserver::class);
         \App\PlanPackage::observe(\App\Observers\PlanPackageObserver::class);
         \App\SignupCode::observe(\App\Observers\SignupCodeObserver::class);
         \App\SignupInvitation::observe(\App\Observers\SignupInvitationObserver::class);
-        \App\Sku::observe(\App\Observers\SkuObserver::class);
         \App\Transaction::observe(\App\Observers\TransactionObserver::class);
         \App\User::observe(\App\Observers\UserObserver::class);
         \App\UserAlias::observe(\App\Observers\UserAliasObserver::class);
diff --git a/src/app/SignupInvitation.php b/src/app/SignupInvitation.php
--- a/src/app/SignupInvitation.php
+++ b/src/app/SignupInvitation.php
@@ -4,6 +4,7 @@
 
 use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Model;
+use App\Traits\BelongsToTenantTrait;
 use App\Traits\UuidStrKeyTrait;
 
 /**
@@ -17,6 +18,7 @@
  */
 class SignupInvitation extends Model
 {
+    use BelongsToTenantTrait;
     use UuidStrKeyTrait;
 
     // just created
@@ -77,16 +79,6 @@
     }
 
     /**
-     * The tenant for this invitation.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function tenant()
-    {
-        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
-    }
-
-    /**
      * The account to which the invitation was used for.
      *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
diff --git a/src/app/Sku.php b/src/app/Sku.php
--- a/src/app/Sku.php
+++ b/src/app/Sku.php
@@ -4,6 +4,7 @@
 
 use Illuminate\Database\Eloquent\Model;
 use Spatie\Translatable\HasTranslations;
+use App\Traits\BelongsToTenantTrait;
 use App\Traits\UuidStrKeyTrait;
 
 /**
@@ -23,6 +24,7 @@
  */
 class Sku extends Model
 {
+    use BelongsToTenantTrait;
     use HasTranslations;
     use UuidStrKeyTrait;
 
@@ -71,14 +73,4 @@
             'package_skus'
         )->using('App\PackageSku')->withPivot(['cost', 'qty']);
     }
-
-    /**
-     * The tenant for this SKU.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function tenant()
-    {
-        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
-    }
 }
diff --git a/src/app/Traits/BelongsToTenantTrait.php b/src/app/Traits/BelongsToTenantTrait.php
new file mode 100644
--- /dev/null
+++ b/src/app/Traits/BelongsToTenantTrait.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Traits;
+
+trait BelongsToTenantTrait
+{
+    /**
+     * Boot function from Laravel.
+     */
+    protected static function bootBelongsToTenantTrait()
+    {
+        static::creating(function ($model) {
+            $model->tenant_id = \config('app.tenant_id');
+        });
+    }
+
+
+    /**
+     * The tenant for this model.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function tenant()
+    {
+        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
+    }
+}
diff --git a/src/app/User.php b/src/app/User.php
--- a/src/app/User.php
+++ b/src/app/User.php
@@ -6,6 +6,7 @@
 use App\UserAlias;
 use App\Sku;
 use App\Traits\UuidIntKeyTrait;
+use App\Traits\BelongsToTenantTrait;
 use App\Traits\UserConfigTrait;
 use App\Traits\UserAliasesTrait;
 use App\Traits\SettingsTrait;
@@ -29,6 +30,7 @@
 class User extends Authenticatable
 {
     use UuidIntKeyTrait;
+    use BelongsToTenantTrait;
     use NullableFields;
     use UserConfigTrait;
     use UserAliasesTrait;
@@ -647,16 +649,6 @@
     }
 
     /**
-     * The tenant for this user account.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
-     */
-    public function tenant()
-    {
-        return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
-    }
-
-    /**
      * Unsuspend this domain.
      *
      * @return void