How do I change my phone number or email address

In order to change your phone number or email address, you need to be using the Marriott Bonvoy Debit Card app. 

Click on your initials in the top left of the app, then click on 'Details' just under your name. You can then update your home address, phone number and email address after some security checks.

If you're not able to update these, you should be directed to the Marriott Bonvoy Debit Card Customer Support team.