Sure, it said to send the assignment to assign@gnu.org. (I originally missed that and sent it back directly to the assignment administrator who was helping me, but then I forwarded on to the proper address. I just never received a reply, perhaps it just got marked as spam my end?)

Thanks for all your work, I'm a big fan.

Cheers, Dave.

On Fri, Jan 8, 2016 at 5:57 AM, Richard Stallman <rms@gnu.org> wrote:
[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > I emailed my signed copyright assignment form on the 19th of December.

  > I don't know how to check that it has been actioned there end, I have not
  > heard back from them.

Please write to assign@gnu.org.

When they sent you email, did the email say what email address to
contact them at?  It should.

--
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.