The gas station shops and gas station shops which turn into announced audits all require the use of some type of card at the pump. That is one of the things which is being evaluated, and frankly, life gets complicated when it so much as doesn't give you a receipt. You need to go in, get a receipt, or pay inside (using a card) and get a receipt. And with some clients, repeat the process at a second pump. Where if you don't get a receipt, you go back in and ask for a second one, still unrevealed. I find that so absurd, that I wait until the reveal for pump #2, and I explain that in the report, and have never had a problem.
Pre-paid cards do not have limits on how many times a day you can use them, and they do not freeze $50 or $75 or $100 in your credit card or debit card account every time you swipe then at a pump. For shops where I am told to use a credit or debit card (yes, they exist), I make sure to have multiple cards with me. Some people on this forum report success telling their bank to expect lots of small gasoline purchases, but I think the systems still freeze the $ 50/75/100 for several days anyway even if they don't lock out the card.
And I have done ones which also test whether the loyalty card works properly when swiped at the pump and how long it takes for the next screen to appear. Nothing is standard.
Shopping Southeast Pennsylvania, Delaware above the canal, and South Jersey since 2008