The PIN is nothing other than the five digit Zip Code (post code) of the billing address. I have purchased gasoline in the USA with my International Dollar Card which is billed to my UK address and therefore does not have a Zip code. I merely entered five 0's or 9's. However, I have not does this recently and cannot say that it will always work.
Originally Posted by
747_not_777
... others insist you authorise it for a set amount first.
When you pay at the pump the system automatically authorizes an amount sufficient to fill an empty tank. It might be as much as $100 now. This doesn't mean you will be billed for that amount. Are you sure the attendant actually wants to finalize a charge for a specific amount?