The paper receipt most likely doesn't have any information (his name, email, etc) that identifies him as the actual person that was in the store that day and ma

The paper receipt most likely doesn't have any information (his name, email, etc) that identifies him as the actual person that was in the store that day and made the purchase. He said he purchased with cash or a card he doesn't have anymore. Surely you can see how just handing out a generic receipt to whomever shows up and asks for it is a real issue. Lesson here is, for ANY merchant: pay with a credit card, have the receipt emailed to you if possible. If not take a picture with your cell phone of the receipt, _on the spot_. That's it, you are future proofed.