This email is sent through a notification template enabled in Punchh in Settings > Notification Templates > Reset Passcode Instructions.
The email is sent to the email the guest used/associated with their account. Included in the email is a unique link they can use to reset their gift card passcode.
Picture of Email in inbox:
Contents of email showing link:
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)