For Special order custom printing I require a 25% non returnable deposit to cover my material costs and the time involved in making the prints, this is non negotiable, if they wish to view already made prints I need the full purchase price which is returnable upon the prints being returned undamaged, and if I am asked to take and print a specific photograph for a client then I charge a 50% deposit, I do not think this is unreasonable with the time and costs of materials involved for what is today a very special service, and I have never been turned down.
Richard