Originally Posted by tacpot
If the other airfield didn't tell your customer there would be a charge for the approach when he called them, then they can't levy a fee, as a contract wasn't formed.
Have you ever refused to pay at the end of a journey in a car with a large sign marked "TAXI" on the roof, on the basis that the driver didn't explain at the beginning of the trip that there would be a fare to pay?
That said, it would be difficult to argue that an aircraft making an approach without landing at an uncontrolled aerodrome was making use of the services of the aerodrome.