diff --git a/src/resources/vue/Wallet.vue b/src/resources/vue/Wallet.vue
--- a/src/resources/vue/Wallet.vue
+++ b/src/resources/vue/Wallet.vue
@@ -115,7 +115,7 @@
                     {{ $t('wallet.norefund') }}
                 </div>
             </div>
-            <div id="auto-payment" v-if="paymentForm == 'auto'">
+            <div id="auto-payment" v-if="paymentForm == 'auto' && !mandate.isFixed">
                 <form data-validation-prefix="mandate_">
                     <p>
                         {{ $t('wallet.auto-payment-hint') }}
@@ -149,6 +149,31 @@
                     {{ $t('wallet.norefund') }}
                 </div>
             </div>
+            <div id="auto-payment" v-if="paymentForm == 'auto' && mandate.isFixed">
+                <form data-validation-prefix="mandate_">
+                    <p>
+                        You will be charged for the full amount of your plan on your credit-card.
+                    </p>
+                    <div class="row mb-3">
+                        <label for="mandate_amount" class="col-sm-6 col-form-label">{{ $t('wallet.fill-up') }}</label>
+                        <div class="col-sm-6">
+                            <div class="input-group">
+                                <input type="text" class="form-control" id="mandate_amount" v-model="mandate.amount" required>
+                                <span class="input-group-text">{{ wallet.currency }}</span>
+                            </div>
+                        </div>
+                    </div>
+                    <p v-if="!mandate.isValid">
+                        {{ $t('wallet.auto-payment-next') }}
+                    </p>
+                    <div v-if="mandate.isValid && mandate.isDisabled" class="disabled-mandate alert alert-danger m-0">
+                        {{ $t('wallet.auto-payment-disabled-next') }}
+                    </div>
+                </form>
+                <div class="alert alert-warning m-0 mt-3">
+                    {{ $t('wallet.norefund') }}
+                </div>
+            </div>
         </modal-dialog>
     </div>
 </template>