If only the last digit has changed, updating your card number in the ABN AMRO app is simple.
Tap ‘Profile’.
Under ‘Access and usage’ tap ‘Set new card number’ and change your card number.
If digits other than just the last digit of your card number have changed, delete your device registration and register again.
Tap ‘Profile’.
Tap ‘Registered devices’.
Tap the recycle bin next to the name of your device.
Confirm with your identification code.
Now you need to reactivate the ABN AMRO app. You'll need your ID to do that.