**I require that you upload cash receipt. Please do not start trade if you cannot upload cash receipt for your gift card.**
Assuming you have cash receipt and start a trade, first tell me the denomination, like 1 x $500 or 2 x $200 or so. Then wait for me to accept the trade before giving me your card info. Once you give me your card number and upload cash receipt, I will check card balance. Never mark trade as paid before my confirmation of the balance.