hmm, there's a story about that, some guy got one of those "fake" checks in the mail, readers digest sweepstake crap or something like that. For yuks he deposited it. Waited 30 days confirmed the money was still in the account, called the bank to confirm that after 30 days the check was good, waited 15 days more, then emptied his account, got a cashiers check for the original amount and stuck it in a safe deposit box.
After 60 days the bank called him, the check was bogus etc etc
They were gonna sue him, don't remember the whole story, but eventually he gave them the cashiers check and was just happy to have a funny story to tell.
See he knew the money wasn't his, even though the bank confirmed it was. That story can be found somewhere on the internet, I read it years ago