When claiming Checkout 51 gas offers, prepaid receipts are not accepted as proof of purchase for your offer. This is because prepaid receipts do not display all of the crucial information we need in order to process the offer and get you your Cash Back.
To earn Cash Back, you must use a credit or debit card to make your purchase and have proof of this through the receipt. Make sure to get a final transaction receipt and upload a picture of the entire receipt to earn Cash Back for your offer.