I backed the the wrong race one day at Belmont park one day and didn't relise till after the race when i had thrown my ticket away....and wamo the horse i backed won the next race at 68/1 i had to fill in a lost ticket report didn't have any trouble getting my money not many people had $10 on the nag....just had to wait 2 weeks......if i make a mistake now and i can afford it i just leave the bet on and also put the correct bet on......i never change it