I do at the petrol station, I know it's illegal but safety wise with three children out of the car with so many cars coming and going seems a lot more risky for us. I do wish the woolworthx pay at the pump service could use any banks card not just theirs I would much prefer to pay at the pump and not leave the kids
We used to have a Mobil not far that still accepting Pay@Pump, but they don't any more. Funnily I suggested we get the Woolies Card to DH just for petrol use for this very reason. It was not too hard to take DS in while paying, but taking a baby and a toddler in is just too hard so I am seriously going to get the card before bubs arrives.

I have left DS in the car to pay for petrol before, and when parked right in front of the ATM to get cash, but unless the car is literally a few metres from where I need to go, I don't, I'd rather risk waking them.