I've previously discussed the benefits of using credit cards to purchase prepaid debit cards. Now, I'd like to share a cautionary tale from Flyertalk. ma91mph posted an example of losing (temporarily, one hopes) the funds on two of his cards after they were refunded to the card through a failed billpay transaction. The takeaway is that if you pursue this route, it's important to keep your receipts and your used cards. Even after you think you've used the card up, it could be important to prove that you purchased it.