Some gift cards come with a detachable top half. In some cases, the top half may appear to contain a bar code but this is usually a bar code for the cashier to ring up the gift card. It is not the gift card itself.
If a customer attempts to sell a gift card at your store, please make sure that you are taking the entire gift card and not tearing off and returning any part to the customer. If the customer only has the card "top" (pictured below), please note this is NOT a gift card. It is just the hanger that it hangs on the rack and does not contain card information and cannot be accepted by GiftCardBin or the merchant. Any card tops sent in like this will not be accepted by GiftCardBin and will be marked missing.