diff --git a/modules/system/lang/en/validation.php b/modules/system/lang/en/validation.php
index 93a81b984..1be1e2dbb 100644
--- a/modules/system/lang/en/validation.php
+++ b/modules/system/lang/en/validation.php
@@ -156,6 +156,8 @@ return [
         'phone_already_verified' => 'You have already verified your phone number.',
         'phone_verified_message' => 'Your phone number has been succesfully verified',
         'phone_verification_code_invalid' => 'Invalid sms code',
+        'phone_already_exists' => 'This phone number has already been taken.',
+        'email_already_exists' => 'This email has already been taken.',
     ],
 
     /*
diff --git a/modules/system/lang/ru/validation.php b/modules/system/lang/ru/validation.php
index bd4d90341..ee1e79083 100644
--- a/modules/system/lang/ru/validation.php
+++ b/modules/system/lang/ru/validation.php
@@ -156,6 +156,8 @@ return [
         'phone_already_verified' => 'Номер телефона уже подтвержден.',
         'phone_verified_message' => 'Ваш номер телефона подтвержден',
         'phone_verification_code_invalid' => 'Неверный СМС код',
+        'phone_already_exists' => 'Пользователь с таким номером уже существует.',
+        'email_already_exists' => 'Пользователь с таким email уже существует.',
     ],
 
     /*
diff --git a/modules/system/lang/tm/validation.php b/modules/system/lang/tm/validation.php
index dede076bd..6bce37056 100644
--- a/modules/system/lang/tm/validation.php
+++ b/modules/system/lang/tm/validation.php
@@ -158,6 +158,8 @@ return [
         'phone_already_verified' => 'Siziň telefon belgiňiz eýýäm tassyklanan.',
         'phone_verified_message' => 'Siziň telefon belgiňiz tassyklandy',
         'phone_verification_code_invalid' => 'Nädogry SMS kody',
+        'phone_already_exists' => 'Bu belgi öňden hasaba alyndy.',
+        'email_already_exists' => 'Bu el. bukja öňden hasaba alyndy.',
     ],
 
     /*
diff --git a/plugins/vdomah/jwtauth/routes.php b/plugins/vdomah/jwtauth/routes.php
index 52112e2e2..bcb7691f1 100644
--- a/plugins/vdomah/jwtauth/routes.php
+++ b/plugins/vdomah/jwtauth/routes.php
@@ -163,15 +163,33 @@ Route::group(['prefix' => 'api'], function() {
             'dial_code' => 'required',
         ];
 
+        $messages = [
+            'email.unique' => [
+                'ru' => trans('validation.api.email_already_exists', [], 'ru'),
+                'en' => trans('validation.api.email_already_exists', [], 'en'),
+                'tm' => trans('validation.api.email_already_exists', [], 'tm'),
+            ],
+            'username.unique' => [
+                'ru' => trans('validation.api.phone_already_exists', [], 'ru'),
+                'en' => trans('validation.api.phone_already_exists', [], 'en'),
+                'tm' => trans('validation.api.phone_already_exists', [], 'tm'),
+            ],
+        ];
+
         // username should be concatenated with username in order to check - validate
         // if a user (with dial_code + username) already exists
         $credentialsToValidate = array_merge($credentials,[
             'username' => $credentials['dial_code'] . $credentials['username']
         ]);
 
-        $validation = \Validator::make($credentialsToValidate, $rules,(new UserModel)->messages);
+        $validation = \Validator::make($credentialsToValidate, $rules, $messages);
         if ($validation->fails()) {
-            return Response::json(['error' => $validation->errors()], 400);
+            
+            $errorResponse = $validation->errors();
+
+            $errorResponse = reset($errorResponse);
+
+            return Response::json(['error' => reset($errorResponse)[0]], 400);
         }
 
         /**