No offense to you, but no general Joe Schmoe is copying my anything. I like to keep my information private, and if you're selling me a table, a gaming console or a cat trapeze, you don't have a need or a right to my personal information. I personally don't see a firearm as any different, and the only requirement by law is that if I don't have a REASON to suspect you are a criminal or doing something illegal, I can sell to you or buy from you.
If someone tells me they want to copy my information, our deal is off. No harm no foul, unless I'm upset because they didn't tell me this beforehand and I went out of my way to come meet them. If you have those requirements, you really need to make those known to people before you make arrangements. Maybe you do, and if so, cool, just if someone springs that on me after I've driven 45 minutes to go meet them, I'm probably going to be pretty irritated.
If someone asks you to sign a bill of sale for the gun that indicates you're NOT a prohibited possessor is that acceptable?