Many moons ago when I did my IMC training, my instructor took me to LBA to do an approach to GA. This would be ok, he said, because if we rang them first to check, they wouldn't charge us, so we wouldnt need to land...
Three weeks later I was presented with a 'minimum invoice amount'.
Wasnt best pleased, the trip had been a huge learning experience, but if boss man had had the correct facts we could have landed and paid half the price I was now paying.... aaah well.