Just verifying the credentials of someone is insufficient. It also must be established that the person whose credentials were verified is the person who bought the gun
The fact that credentials are being verified/displayed seem to be self evident that the person displaying them is the buyer. If that person is not the buyer, what need then is there for the verification/display?
Dealer: Are you buying a gun?
Customer: Yes, and I'll be buying it through GLOCKs BLP
Dealer: I need to see your credentials.
Customer: Here you are.
Dealer: O.k. everything looks good. Let's do some paper work and you can be on your way.
Or....
Dealer: Are you buying a gun?
Customer: No, just looking
Dealer: I need to see your credentials
It doesn't compute. The act of displaying ones credentials positively identifies the person as the one making the purchase. As was stated in an earlier post, to do anything other is to commit fraud.