It's funny how misinformation gets passed around. This all came up because of a conversation I had with a long time live-a-board just down the gangway from my boat. In the past he has provided me with good information and has lent a hand a couple times while I worked on my boat in the slip.
He lives on an old Columbia that hasn't left the marina in years. He is always wearing the same white shorts and button up shirt. He doesn't take advantage of the complimentary showers often but like I said, he is personable, and turned me onto the shipyard that recently painted my boat and keeps an eye on the diver that cleans both of our boats (mine regularly, his about a week before the harbormaster will notify him of excessive growth).
Anyway, I had a painter that I was interested in using to paint my registration numbers on the hull and name on the stern, when he comes over and begins telling me how his boat doesn't have a name on it because it's non-documented and then gave me the explanation above. It didn't sound right, but when I got home and looked for clarification, nothing completely contradicted what he said. There's lot of information that define documented boats and a lot of information on names themselves, but nothing that directly links the two and nothing that says non-documented boats may or may not have displayed names, ports, etc.
These answers make sense and are in line with what I believed to be true. Thanks very much.