I have no idea how the Polynesians are tossing dice these days but note that every year, international "details" get tighter all over the world. Stolen vessels, stolen children
...As I recall
you may need to have a prepaid air ticket home before you can enter Polynesia and if you can't prove you own the boat, they would be within their rights to seize the boat and tell you to go home without it until you find the paperwork.
That's the risk you run without having it properly titled and flagged.
If it was previously US owned, it either had a state registration
OR federal documentation
, sometimes both. If the later, it would be easy to track down. If the former, there's probably a state title for it, but not always. And in either case you may need to find the PO and get a notarized bill of sale
or other transfer documents.
Odds are that your bank would not have made a loan without some proof of title, so again, they are the best ones to start asking at.
This is not something to be lightly skipped over, considering the possible problems. And of course, if you have to detour and enter someplace besides Polynesia, that's a whole other potential can of worms.