I bought a doughnut and they gave me a receipt for the doughnut...I don't need a receipt for the doughnut - I give you money and you give me the doughnut, end of transaction. We don't need to bring ink and paper into this. I can't imagine a scenario that I would have to prove that I bought a doughnut. To some skeptical friend, Don't even act like I didn't buy a doughnut, I've got the documentation right here... ***RIP Mitch Hedberg (1968 - 2005)***