# Introduction

It is possible to set up notifications sent to members that remind them about expirations of unused points.

Depending on selected `period`, notifications are sent at specified hour:

  * for `week`: every specified `week_day` and contain number of points expiring next week
  * for `month`: last specified `week_day` of the month and contain number of points expiring next month

## PointsExpirationNotificationsPolicy model

### Definition

Key | Type                      | Description
--------- |---------------------------| ---------
enabled | boolean                   | Are notifications enabled?
channels_preference | string[]             | [Channels preference](doc-341743#channels-preference) for message sending. Available channels are: `sms`, `push`
period | enum: `['week', 'month']` | On which basis the notification should be sent
week_day | integer: [1-7]            | Day of the week the notifications should be sent (1 - Monday, 7 - Sunday)
hour | integer: [0-23]           | Hour of the day the notifications should be sent
next_sending_time | datetime                  | Readonly - Date of next sending, calculated on given `period` and `hour`