There are several possible reasons why the recipient did not receive an intended email/text message. Below mentioned are some common scenarios and troubleshooting tips:
The email could have been delivered to the guest's Spam folder instead of the Inbox. Guide the guest to check the Spam folder.
Verify that the email address entered for the recipient is valid.
Verify that there are enough email and text (SMS) credits in the center to send notifications. You can view your available credits in the right panel at the organization/center level. Contact Support if you wish to add credits.
Ensure that the organization has turned on the email/SMS text template for Gift Card POS. Read: Customizing the Email Template for Gift Card POS.