wrong payment

Suppose a side bet in a blackjack game normally pays 11 to 1. But a particular dealer always pays 13 to 1 to everyone.

Suppose you were playing at the table before the dealer arrives. And you continued to play after the dealer had left. And you didn't increase your side bet.

What happens if 1 hour after the dealer has left, and the casino surveillance find out about the 20 times you were over paid? Are you legally required to pay it back? What happens if you don't have that much money because you have lost them on regular blackjack?

What happens if the casino don't spot the mistake on the day of play, but finds out in 3 days time? and you just happens to be in the casino.

I think you always owe them the extra money. You should never have taken it in the first place (anybody would...you just shouldn't...). They *can* demand the payments back. But presumably you'd never go back if they really did that after 3 days. Hopefully, that's enough of a reason for them to just let it go and focus on retraining their dealers.

Did this actually happen? What jurisdiction did this happen in?

Any state or tribe can have a statute or regulation that handles the issue of incorrect payments. Outside that common law principles dictate that you do in fact owe them the money if they mistakenly overpay you. However, it is not theft on your part and they cannot forcibly take it from you. They would have to recover with a civil action, which they obviously will not do unless it totals at least thousands. My answer to your questions are: if you do not care about your reputation there or they do not know who you are just take your chips and leave. If you don't have any chips because you lost them just leave. If you care about your reputation then pay up if they ask you.

Generally I will not mention an overpayment when one occurs. If I were approached I would likely refuse unless the amount were trivial, in which case I would ask for proof. If they cared enough to provide it I would fork it over.

The only time I have ever pointed out an overpayment to me was when I knew that the dealer would likely be fired for the error.

I, like others, would keep quiet, with intention of keeping it.

If the error is discovered within a hand or two, I.E. where I can easily remember what happened, then I'd return the excess when asked.

Otherwise, I'd want to see the video evidence.