I used to work in a bookstore that had a large academic section, selling textbooks and the like. It was situated near a large college campus, so we got a lot of customers for that section.
I remember when a college girl came in and purchased a crap ton of textbooks. It was way more than any student would reasonably need in a whole year.
Me: “Wow, are you opening your own bookstore?”
Customer: “Nope.”
She pays for the whole thing using a credit card (her name matched the ID), and then she carries all of them over to the buyback desk. This is where we buy back pre-purchased textbooks from students who have no more need of them.
Customer: “I’d like to sell these back to you, please.”
Me: “Uh, since you haven’t even left the building yet, if you need a refund—”
Customer: “—No, I don’t need a refund. I want to sell these back to you.”
Me: “But… you just bought them.”
Customer: “Yeah, but my parents cut me off.”
Me: *Confused look.*
Customer: “Okay, so they gave me spending money last semester, and they got really p***ed off with me because I spent it all, so they cut me off. They said no more money except for textbooks. So, here I am!”
Me: “But… I can only buy these books back at fifty cents on the dollar.”
Customer: “That’s plenty for my partying budget! Cash, please!”
What she was doing wasn’t illegal, so I bought the books back and gave her the cash she needed to party.
For the rest of the year, until I left that job, when she ran out of money, she’d just pick up a few more books, and she’d do the same thing. Apparently, her parents were none the wiser.