I wanted to prove I had balls once so had 500 pounds win on a 4/1 shot in a local Coral shop. The horse won. I got paid out in a brown envelope the next day. No questions asked. No answers given.
That was about 2009. Nowadays I'd probably be given a psychological evaluation not to mention a proper financial check.
I also had a couple monkey bets that went astray, one of them was actually pulled up, but I like to think merrily about the one I landed anyway. My stakes are a lot smaller these days, unless I've got winnings to play up that is.