This afternoon I had this client who I'd seen before, when he was about to pay he said "I've got credit with you" I was a bit confused by what he meant by that - "last time I had to pay ?10 extra because you didn't have change" I just pointed out that I have no way to keep track of that, would've told him before I never give change and that the fee is as agreed and also that every client could say that and they can't prove it! He begrudgingly paid my full fee - and was fine in the booking - cheeky bugger though!