Some discount retailers require the use of a debit card or cash for payment (or in the case of Sam's Club, only their Mastercard). Now, I've been doing a little research to try and make a few points at these locations, but all of the Visa prepaid cards that I've seen don't require a PIN, and the FAQs state that the card should be run as 'credit'. So I don't think they are treated as a debit card payment to the retailer. Are there any exceptions? Any prepaid gift cards that will run with a PIN number?