diff --git a/RestControllers/commentsController.php b/RestControllers/commentsController.php
index 0de98c8..bf19027 100644
--- a/RestControllers/commentsController.php
+++ b/RestControllers/commentsController.php
@@ -56,11 +56,7 @@ class commentsController {
 		components()->notifications->push($notification);
 
 		//Delete any other notification targeting this user about this post
-		$notification = new Notification();
-		$notification->set_on_elem_type(Notification::POST);
-		$notification->set_on_elem_id($postID);
-		$notification->set_dest_user_id(userID);
-		components()->notifications->delete($notification);
+		delete_user_notifications_other_post(userID, $postID);
 
 		//Success
 		return array(
diff --git a/helpers/notifications.php b/helpers/notifications.php
new file mode 100644
index 0000000..4adacb8
--- /dev/null
+++ b/helpers/notifications.php
@@ -0,0 +1,23 @@
+<?php
+/**
+ * Notifications helper
+ * 
+ * @author Pierre HUBERT
+ */
+
+/**
+ * Delete all the notifications related to a post targeting a user
+ * 
+ * @param int $userID Target user ID
+ * @param int $postID Target post
+ * @return bool TRUE in case of success / FALSE else
+ */
+function delete_user_notifications_other_post(int $userID, int $postID) : bool {
+
+	$notification = new Notification();
+	$notification->set_on_elem_type(Notification::POST);
+	$notification->set_on_elem_id($postID);
+	$notification->set_dest_user_id($userID);
+	return components()->notifications->delete($notification);
+
+}
\ No newline at end of file