Ok...did a search, but I must not be thinking of the right terms to use because I'm not getting anything. I order my prints from Mpix for my customers--and obviously they don't have a "Do Not Copy" marking on the back of the print. Does anyone know of a way to mark the prints with your name, etc, on the back? I bought a couple of stampers with my business name on them but the ink won't dry when I stamp them. Thanks!