Back in the day, I was the flight scheduler for a small Canadian charter airline, operating four DC-8-63's and a 707. One of our aircraft was chartered to a destination uncommon for us. I suppose the arrangements we thought were in place, some how were misunderstood. With all the pax aboard, the fueling fellow boarded, and went to the cockpit. With fuel ticket in hand, he asked the flight crew how they would like to pay for the fuel. Well the flight crew were under the belief that the fuel payment had already been arranged - apparently not! The plane was blocked, and not moving until payment was made. So the crew asked the pax to collectively make the payment, which was accomplished.
Of course, all was documented, and each pax repaid with compensation. The following week, every Captain was issued an Amex card, with a huge limit, just in case....