I just sold (2) of my BB gift cards from SB to Cardpool and I was a little concerned about the same thing. I gave them the card numbers and they are sending me a check for the funds. In the mean time, they also have my credit card number so if the funds go missing (or if they CLAIM the funds go missing), they can simply charge my card for the money. I don't know what recourse I would have with the credit card company to prove that I did not use the cards. Seems like the set up is perfect for the company (Cardpool) to take my money...but if they did this regularly, I would think they'd be out of business. Even with the fact that they guarantee to the buyer that the cards will retain their balance, I don't know how that could protect the seller. I mean, couldn't the buyer drain the card and accuse the seller of doing it? I feel like I will be checking my credit card more frequently for the next several months, just to make sure no charges pop up from Cardpool. I guess it's pointless, though, because again, how could I prove that I am not the one that drained the gift card???