[97b683f8]

Another solution is to look up the BIN (bank account identifier, i.e. the 6 first digits of a credit card number):

https://binlist.net/

Then drop the wallet at the bank's closest office.

[Symbiote]

Can't you just look at the big logo on the front of the card that says "Halifax Bank" or whatever?

[adtac]

Hahahaha overengineering at its finest