Well it's Christmas season and unexpectedly I found a political point within the famous film, Miracle on 34th Street. If Kris Kringle won his court case because the post office delivered letters to him, then we can likely use letters to establish not who we are but where we are. And that would be 'without United States', meaning not in one of the territories. We live within one of the 50 states. We use the postcards to establish domicile.
Here's a link to the new blog post.
As a gift to all supporters, I can send the postcard to thee. It's a new approach that builds on the four cent letters. Of course, the letters are sufficient. The postcards make it even more explicit.