diff --git a/src/Exceptions/ForbiddenException.php b/src/Exceptions/ForbiddenException.php
index 5699066..a6c077d 100644
--- a/src/Exceptions/ForbiddenException.php
+++ b/src/Exceptions/ForbiddenException.php
@@ -14,8 +14,9 @@ public static function forOnlyAjax()
         return new self( lang( 'Rest.textRestAjaxOnly' ) );
     }
 
-    public static function validationtMethodParamsError()
+    public static function validationtMethodParamsError( $param )
     {
-        return new self( lang( 'Rest.textInvalidMethodParams' ) );
+        $parser = \Config\Services::parser();
+        return new self( $parser->setData( array( 'param' => $param ) )->renderString( lang( 'Rest.textInvalidMethodParams' ) ) );
     }
 }
diff --git a/src/Language/en/Rest.php b/src/Language/en/Rest.php
index 493dbe2..2045b2f 100644
--- a/src/Language/en/Rest.php
+++ b/src/Language/en/Rest.php
@@ -15,7 +15,7 @@
     'textRestApiKeyUnauthorized' => 'This API key does not have access to the requested controller',
     'textInvalidUserClassConfiguration' => 'Invalid user class configuration, extends( \Daycry\RestServer\Libraries\User\UserAbstract )',
     'textRestAjaxOnly' => 'Only AJAX requests are allowed',
-    'textInvalidMethodParams' => 'Invalid params for this method'
+    'textInvalidMethodParams' => 'Invalid params for this method: {param}'
 ];
 
 /*
diff --git a/src/RestServer.php b/src/RestServer.php
index 98bcaec..1169061 100644
--- a/src/RestServer.php
+++ b/src/RestServer.php
@@ -875,7 +875,7 @@ protected function validation( String $rules, \Config\Validation $config = null,
             {
                 if( !array_key_exists( $key, $config->{$rules} ) )
                 {
-                    throw ForbiddenException::validationtMethodParamsError();
+                    throw ForbiddenException::validationtMethodParamsError( $key );
                 }
             }
         }