What is my device account number and how it is different to my card number?
When adding your Greater Bank Visa card to Apple Pay, your card number is not recorded - a device account number is created instead.
Your account details aren’t shared with merchants as they will only receive the device account number.
This is done to protect your card details so they aren’t exposed to others.
Apple Pay Terms of Use.
Apple, the Apple logo, Apple Pay, Apple Wallet, Apple Watch, Face ID, iPad, iPhone, iTunes, Mac, MacBook Pro, Safari, and Touch ID are trademarks of Apple Inc., registered in the U.S. and other countries and regions. For a list of compatible Apple Pay devices, see support.apple.com/en-us/HT208531