Use critical thinking. No you don't cycle down a list. You say "hey I think your passport might have an extra letter r in it, you have another credit card, medical card, etc. I can take a look at?"

If anyone with a brain really thinks it's a forged passport they would skip straight to the whole "denying the transaction" part and reporting it through the banks reporting system.

This whole thread is a mind fuck of really dumb opinions. The cops just should not have been called.