Then you have to approach this from the bottom up.

You're going to need to get the affidavit they have at the DMV four vessels or vehicles that have no whole identification number, and in the description right that you were able to get the boat for free, from the front yard of a guy who is giving it away.

Next, you need to explain that there are no Hull identification numbers available on the boat. Probably because it was built before whatever the cutoff date is for boats. I think that's something like 1980 or 1960. I can't remember off the top of my head even though I do this almost every up two years.

You're going to get that form notarized, of which prior to if there were any traces of a hull identification number you're going to eliminate those.

The notarized affidavit explaining how you obtain the boat and the fact that there's no registration numbers or all identification numbers to trace back to a previous owner will take the place of the bill of sale, and eliminate the hassle of when they inevitably Trace back the hull identification number or the old registration numbers to whoever the previous owner was, who is likely dead or unable to be found.

Now you will be assigned a new Hall identification number, a new registration number, and handed your registration and stickers. You may or may not have to bring the boat in, and if it's sitting on a trailer you will likely have to do the exact same process for the trailer.

you're welcome to call me if you need help. I've had to do this with a lot of small Jon boats for projects that were older, which I was either given for free or purchased for a very small amount of money from a scrap yard or a marina that just had them lying around in the back.