diff --git a/app/Http/Requests/Bo/CreateMessage.php b/app/Http/Requests/Bo/CreateMessage.php
index a714eda..d83e9ee 100644
--- a/app/Http/Requests/Bo/CreateMessage.php
+++ b/app/Http/Requests/Bo/CreateMessage.php
@@ -54,7 +54,19 @@ class CreateMessage extends FormRequest
         $user = auth()->user();
         return [
             'subscribe'       => 'required|boolean',
-            'message'         => 'required|min:' . ($user->isAdmin() ? '5' : '20'),
+            'message'         => [
+                'required|min:' . ($user->isAdmin() ? '5' : '20'),
+                function ($attribute, $value, $fail) {
+                    $forbidden = ['merci de', 'merci  de'];
+                    foreach ($forbidden as $word) {
+                        if (stripos(strtolower($value), $word) !== false) {
+                            $fail(
+                                "Le champs 'Message' contient la chaine de caractère non autorisée suivante : $word"
+                            );
+                        }
+                    }
+                },
+            ],
             'file_messages'   => 'sometimes|array',
             'file_messages.*' => 'mimes:pptx,docx,xlsx,csv,txt,jpeg,jpg,png,pdf,svg|max:2048',
             'type'            => ['required', new Enum(MessageTypeEnum::class)]
diff --git a/app/Http/Requests/Bo/StoreTicket.php b/app/Http/Requests/Bo/StoreTicket.php
index 8c5a568..a58745b 100644
--- a/app/Http/Requests/Bo/StoreTicket.php
+++ b/app/Http/Requests/Bo/StoreTicket.php
@@ -97,7 +97,19 @@ class StoreTicket extends FormRequest
                 }
             ],
             'date_mep'       => 'nullable|date',
-            'text'           => 'required|string|min:40',
+            'text'           => [
+                'required|string|min:40',
+                function ($attribute, $value, $fail) {
+                    $forbidden = ['merci de', 'merci  de'];
+                    foreach ($forbidden as $word) {
+                        if (stripos(strtolower($value), $word) !== false) {
+                            $fail(
+                                "Le champs 'Description du ticket' contient la chaine de caractère non autorisée suivante : $word"
+                            );
+                        }
+                    }
+                },
+            ],
             'title'          => 'required|string|between:3,255',
             'file_tickets'   => 'sometimes|array',
             'file_tickets.*' => 'mimes:pptx,docx,xlsx,csv,txt,jpeg,jpg,png,pdf,svg|max:2048',