You probably already know you can't use USPS, that is license to license with a PO form 1508 and copy of both licenses. I always send a copy of my ffl by snail mail or a jpeg on an email they can print. Technically all the ffl needs is your physical address to log it. By default, you have to use a common carrier anyway and if you declare THEY want a copy of the FFL license. Email takes seconds to receive and print the ffl.


Q: May a nonlicensee ship a firearm by common or contract carrier?

A nonlicensee may ship a firearm by a common or contract carrier to a resident of his or her own State or to a licensee in any State. A common or contract carrier must be used to ship a handgun. In addition, Federal law requires that the carrier be notified that the shipment contains a firearm and prohibits common or contract carriers from requiring or causing any label to be placed on any package indicating that it contains a firearm.
[18 U.S.C. 922(a)(2)(A), 922(a) (3), 922(a)(5) and 922(e), 27 CFR 478.31 and 478.30]