The RichExchanger exchanger sсript is able to notify users about successful authorization.
If the setting "notify the user about authorization" is set in the personal account, then each time, upon successful authorization, the user will receive a message.
The setting is set in the user profile.
In this case, it should be borne in mind that for the correct operation of this setting, a special message template is required. If the template is not set, the notification will not come.
The message template is set in the "Messages" section. - "Notification of the user about authorization".