Banks have no form for this

And that is amazing to me --- banks do not have a form, any kind of receipt or digitized fill in the blanks document for --- when you bring them back money they gave you in error. Actually I was just pretending they gave me the wrong change, as a matter of curiosity. But isn't that interesting--how many thousands of forms, digital and paper and so volumious, and yet no form for when a customer returns money the bank overpaid them.