diff --git a/class/UserRight.class.php b/class/UserRight.class.php
index c30185e..9d88006 100644
--- a/class/UserRight.class.php
+++ b/class/UserRight.class.php
@@ -9,6 +9,7 @@
 
 use \Payutc\Db\Dbal;
 use \Payutc\Db\DbBuckutt;
+use \Payutc\Bom\User;
 
 class UserRight {
     protected $db;
@@ -108,7 +109,10 @@ public static function getRights($fun_id) {
      * Donne les droits à un user sur un service et une fundation
      */
     public static function setRight($usr_id, $service, $fun_id) {
-        $allready_set = true;        
+        if (!User::userExistById($usr_id)) {
+            throw new \Payutc\Exception\SetRightException("User #$usr_id does not exist");
+        }
+        $already_set = true;
         try {
             if($fun_id) {
                 static::check($usr_id, $service, true, $fun_id);
@@ -116,9 +120,9 @@ public static function setRight($usr_id, $service, $fun_id) {
                 static::check($usr_id, $service, false);
             }
         } catch (Exception $e) {
-            $allready_set = false;
+            $already_set = false;
         }
-        if($allready_set) {
+        if ($already_set) {
             throw new \Payutc\Exception\RightAlreadyExistsException("L'utilisateur à déjà ce droit.");
         }
 
diff --git a/src/Payutc/Bom/User.php b/src/Payutc/Bom/User.php
index 1df6e3b..02a53f8 100644
--- a/src/Payutc/Bom/User.php
+++ b/src/Payutc/Bom/User.php
@@ -448,4 +448,14 @@ public static function createAndGetNewUser($login) {
         // Return a User object
         return new User($gingerUser->login, $gingerUser);
     }
+    
+    public static function userExistById($id) {
+        $qb = Dbal::createQueryBuilder();
+        $q = $qb->select('count(*) as count')
+                ->from('ts_user_usr', 'usr')
+                ->where('usr_id = :id')
+                ->setParameter('id', $id);
+        $res = $q->execute()->fetch();
+        return 0 != $res['count'];
+    }
 }
diff --git a/tests/UserRightRodbTest.php b/tests/UserRightRodbTest.php
new file mode 100644
index 0000000..7f66b3e
--- /dev/null
+++ b/tests/UserRightRodbTest.php
@@ -0,0 +1,27 @@
+<?php
+
+require_once 'bootstrap.php';
+
+
+class UserRightRodbTest extends ReadOnlyDatabaseTest
+{
+	/**
+	 * get db dataset
+	 */
+	public function getDataSet()
+	{
+        return $this->computeDataset(array(
+            'users.yml'
+        ));
+	}
+	
+    /**
+	 * @expectedException		 \Payutc\Exception\SetRightException
+	 * @expectedExceptionMessage User #99942 does not exist
+     */
+    public function testSetRightOnNoExistingUserThrowException()
+    {
+        UserRight::setRight(99942, 0, 0);
+    }
+}
+
diff --git a/tests/UserRodbTest.php b/tests/UserRodbTest.php
index 538628e..f2a0425 100644
--- a/tests/UserRodbTest.php
+++ b/tests/UserRodbTest.php
@@ -74,5 +74,12 @@ public function testCheckUsrNotBlockedWithBlockedUsr_2()
 		$u = new User("mguffroy");
 		$u->checkNotBlocked(1);
 	}
+	
+	public function testUserExist()
+	{
+		$this->assertFalse(User::userExistById(99942));
+		$u = new User("trecouvr");
+		$this->assertTrue(User::userExistById($u->getId()));
+	}
 }