I can tell you that when I was directed to use self-checkout when no regular checkout lanes were available and tried to buy $500 of Visa GCs with Happy GCs, it would prompt the cashier at the computer overlooking the self-checkout area to check my ID and compare it to the card swiped for each card swiped. I'm not sure if it would not have prompted with a smaller amount, or with other gift cards instead of Visa gift cards.