Several months ago, armed with a new debit card whose PIN I was having trouble remembering, I went to our local Meijer gas station to buy gas, put in my card, and punched in 4 digits even though I was not sure they were correct. When the pump allowed me to pump gas, I assumed that I had got the PIN right. But when I replaced the nozzle, instead of getting a receipt, I saw a "Please pay inside" message. When I went inside to find out what was going on, the cashier told me that the card had been declined. I then used the same card and a different set of 4 digits and all was OK.
But what would have happened if I hadn't waited for a receipt and simply jumped in the car and driven off? Or what would have happened if that card had been the only means of paying for the gas and I had been unable to remember the PIN and pay for the gas I had already pumped. Undoubtedly I would have found myself in big trouble either way.
A little while later I went to the customer service desk and told them what happened. They said that sounded very strange and they would report it, but today I was told that the pumps still do the same thing.
Why on earth are the pumps programmed to allow me to pump gas when the card has been declined?
I have no idea whether other gas stations' pumps are the same, but IMO it's something you should keep in mind.
Perce