I bought a gun back 8 or 9 yrs ago from what I thought was a member but at the meet I found out it was the neighbor to the member. He ask if he could "peek" at my credentials, then tried to get me to read him the information. I made up some funny crap and finished the transaction. Thought about just walking off but I wanted it and he got some fictional information. Just go too the meet and when that crap comes up, just say sorry I don't have it with me and go on. The feedback system is to make sure folks show up, no one is obligated to go beyond that..
It is a little shady to change who shows up at the meet. I've listed stuff for friends or coworkers, but definitely make sure to say if they are the ones going to the meet. Once I took the items myself for them.