Yes he can. The seller should always send a copy of a photo ID for the FFL's records. A non-FFL can ship a gun to an FFL for repairs etc. and have it returned. There is no difference, I believe , on a sale where the dealer completes the NICS check and any State requirements before turning the gun over to the purchaser. If the gun is refused, it can be returned to the sender and is entered into the records book of the FFL holder.

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