diff --git a/rhodecode/model/notification.py b/rhodecode/model/notification.py
--- a/rhodecode/model/notification.py
+++ b/rhodecode/model/notification.py
@@ -134,6 +134,12 @@ class NotificationModel(BaseModel):
         user = self.__get_user(user)
         return user.notifications
 
+    def mark_all_read_for_user(self, user):
+        user = self.__get_user(user)
+        UserNotification.query()\
+            .filter(UserNotification.read==False)\
+            .update({'read': True})
+
     def get_unread_cnt_for_user(self, user):
         user = self.__get_user(user)
         return UserNotification.query()\