Not sure how to handle this. We designed some signs and a reward card that we printed as a business card for a customer. They paid for all of it, and were charged a design fee for the cards. Now they emailed me asking for the .pdf so they can run them off a copier they have instead of me printing them. I feel that they paid for the design work, but am uncomfortable about them opening and using elements of the .pdf to do other signwork elsewhere. What I would normally do is put security on the .pdf so that they can only print what is there. Does this seem like the right thing to do? I think they are just trying to cut costs on cards....but I know they work with another sign person as well as me (don't ask....long story!). Any thoughts? Thanks!