SF, I think you committed that most hanus crime, "Failure to Receive". Same thing happend to me on one of my planes. Mailed in a form (they had two on the website back then), but it turned out it was the wrong one. Even though the information was identical. Poked them with a letter a month after the shutdown ended, and got told what I needed to do. Did that, two months later, they finally got around re-registering the plane. I don't have the paper one yet, but is no longer shows as "expired" in the on-line registry.

Far as I have been able to tell, they are still mailing them. I suspect yours somehow got lost in the mail.

Steve Leonard