Originally Posted by redietz View Post
The only contribution I can make to this is from the sports gambling milieu. If you have a winning ticket, and the casino employee cashing the ticket makes an error and pays you some multiple of the actual winnings, when accounting catches that, you do have to pay back the overpayment. If you refuse, you will be charged. The reasons for this are pretty obvious, but once you have established that's the law for person/person transactions, then I'm assuming that it automatically applies to machine glitches as well.

MrV can chime in with some expertise here.

Now that sports wagering can be done online or from kiosks, this has some relevance. If a kiosk multiplies some winner, and I cash out my account, you can be assured the casino is coming after me.
I'd take the money but be prepared to deal with the casino later.

There's a law that says when merchandise is sent to you in the mail and you didnt order it, you can keep it as a gift.