US citizen asking here, to dispel any immediate ambiguity: what sort of papers do you mean, or what examples in other countries is there that you speak to? Exa

US citizen asking here, to dispel any immediate ambiguity: what sort of papers do you mean, or what examples in other countries is there that you speak to? Example, the closest thing to “papers” here-if I understand your “papers” to mean identification, would be a “driver’s license” (or just a plain state ID card which one is not compelled to possess, at least not at the National level) but that’s more a thing certifying your knowledge of how to safely operate a motor vehicle, understand local laws and the like-which I understand to be consistent with some other countries. It’s not really a document certifying one has “permission” to travel freely about the country though. If I wanted to walk from a Charleston South Carolina to San Francisco, and cross every state border along the way, I’m allowed to. This level of freedom is illustrated pretty beautifully in a scene from the movie Forrest Gump https://youtu.be/tWzbCk18wTw https://youtu.be/tWzbCk18wTw