If you want to notify the buyer that a payment has been canceled:

1. Sign in to the Merchant Back Office.
2. Go to the Settings > Notification rules menu.
3. Click Create a rule at the bottom of the screen.
4. Click on Advanced notification.
5. Select E-mail sent to the buyer as Type of notification.
6. Click on Next >.
7. Check the Transaction canceled by the merchant box.
8. Click on Next >.
9. Enter the Rule reference.
10. Click on Create.

e-mail