Fill up can't pay?

Question

What happens if you fillup with petrol and your card gets refused and you have no cash. Do they sue you?

Answer 1

I know a clerk who made the guy call one of his buddies and bring another card.

Answer 2

It is quite possible that the garage will take your car keys until you pay up, either way , you will not be allowed to drive away without payment/

Answer 3

They will likely hold your card and offer you a choice: Either make some phone calls and get some friends to come bring you the money you need, or they'll call the police.