[guncrank]

I open every box I get before or after the customer get there.
Usually before.
I do that to get the serial number. If the customer calls and I gave yet not opened the then fine, but if they do not get there I open it anyway.

And I put the gun back. If there is damage that is noted and the buyer notified.

Legally the buyer is not the owner until the 4473/NICS check is done.

Never had a complaint about it.
If the buyer asks to open the box OK by me but I must book the gun by the end of the buisness day and to do that I look at the gun itself.
Not the end label or other paper work.
Could have wrong box or a different box or a mistake made in writting down number.
That has happened both times.