I went to a library book sale yesterday and didn't realize until I had left that they had overcharged me by $30 to $40. I plan to go back today to get more sale books. If it were you, would you ask for a refund or credit? Would you let it go as a one-time mistake and consider it a donation? Would you mention it to them at all? I don't think it was done purposefully. I am just a bit disappointed. I am not wealthy. This is my one luxury I allow myself. I might be willing to donate that amount if asked, but I don't like things taken from me without my permission. I'm not really angry, just a little let down. What would you do?
Edit: I did mention it. They remembered me because I buy more than anyone else. They figured out their error on their own. The tallier left a number of books which the cashier assumed was a dollar amount. (The books were supposed to be $.50 each, so they basically doubled my payment for that part of the order.) They gave me a $40 credit, which I more than used. 😊