It's not the first time I'm selling a printed work(though normally I do advertising photography), but, probably, the first time I need to take it really seriously, because the client wants it to be a very limited edition. There were questions here similar to mine, but i'll specify some aspects, and will ask a bit more. 1) The print is going to be 76x125 cm (30x50"). Never sold before, but I've presented this very image to my friend as a gift a couple of years ago in 20x30 (8x11,5")size. Should the latter count as the first released print of this image and this big one as a second, or, as I've most commonly heard, you should count release numbers within print size categories( i.e. #2of20 in NNxMM" size)? 2)The client asks for the proof of this print being of limited edition. Should I issue some kind of a written statement or a certificate to him??? Or simply sign on the reverse? How should I correctly sign it? Like #1 of 20 plus date of issue and the year of being taken? What is the most commonly used and preferred pattern (used by galleries and those who collect photographs)? 3) Does selling an image as a limited edition print restricts or forbids further commercial use of the image? Say, using it in a calendar or poster printing? or annual reports or whatever printed advertising product... 4) What should I do, if I've already sold or presented as gifts some prints (mostly in not a really large sizes, and not many)that I've later decided to be worthy of being issued in limited edition. Should I find and sign them as first or second released ones, and sign next ones according to the order? Or simply leave it as is? I will be really grateful for your recommendations and answers!