I tried to put through 3 $50 Disney gift cards at HD in a single, self check-out transaction, as a credit card payment, using a Happy Guy GC. That triggered an error, causing employees to come over. They told me I can't buy GCs with a GC, but I showed them the back of the Happy Guy card that said to process as a credit card transaction. I suggested we try a single $50 Disney card, so they deleted two cards, and we tried again; it went through. We then tried the other two $50 cards together, but got the error message, so they walked over to their register to process, and the transaction went through. If I try again, I will only process one $50 GC at a time.