Where Would You Even Start With This One?

I work in a call center for a credit union.

Customer: “I’m trying to figure out how to make a cash deposit on your banking app.”

Me: “That’s not possible.”

Customer: “It works for a check, so why not cash? Bills have serial numbers on them. If I take a picture of the bills, front and back, that cash should be in my account and can’t be used anywhere else.”

I want to say that I don’t know how anyone will ever beat this level of stupid, but that’s just inviting trouble.