If an item is returned, canceled, or exchanged, the applicable GasBack will be reversed, meaning that we will deduct the amount you earned from your GasBack balance. If the amount of the GasBack that is reversed is more than what is in your GasBack balance at the time of the return, cancellation, or exchange, this may result in your balance showing a negative GasBack amount. You cannot redeem GasBack if your GasBack balance is negative, however you can still earn GasBack to get it back into a positive, or redeemable status.