I've heard some say yes they got a credit and other have said no. I don't take a chance and IF there is any left over, I go to the cashier's cage and ask for any remaining OBC. There is a 3% charge for this type transaction. Some people have said there is a way to get it through the slot machines after you set up a slot machine account but I haven't done it that way yet. On one cruise I had about $4.30 OBC remaining. Bought 3 candy bars and ended up owing Princess 50 cents - which they promplty charge to my Visa card.