Walter said it well, "He can operate his business anyway he wants to."

As an FFL holder who primarily uses it to ship my own guns and projects, I almost never take a gun from a non-FFL unless it is a client. There is a certain insulation from gun crime and legal situations in the legitimacy of an FFL and it is my choice to do business as I please. I would accept a gun from Walter anytime, a man of know integrity who uses his name in public, but I'd think twice about receiving one from a fellow calling himself Dogon or Replacement.

It only makes sense to check it out before you ship to avoid bringing potentail hassles upon oneself.