diff --git a/modules/notification/notification_detail.model.js b/modules/notification/notification_detail.model.js
index 805db8d..cb577a9 100644
--- a/modules/notification/notification_detail.model.js
+++ b/modules/notification/notification_detail.model.js
@@ -57,6 +57,15 @@ module.exports = function (sequelize, DataTypes) {
         timestamps: true,
     });
 
+    NotificationDetail.addScope('onlyWithoutReceipt', () => {
+        return {
+            where: {
+                receiptDate: { [Sequelize.Op.ne]: null }            
+            }
+        }
+    });
+
+
     NotificationDetail.associate = function (models) {
         NotificationDetail.User = NotificationDetail.belongsTo(models.User, { foreignKey: 'userId', as: "user" });
         //NotificationDetail.Notification = NotificationDetail.belongsTo(models.Notification, { foreignKey: 'notificationId', as: "user" });