You can get this done where you get the plates for your car, Dept of Motor Vehicles. I tried to register my trailer, and the red tape was overwhelming. I decided to leave it off and if I get a ticket, I'll just pay it. They wanted a notarized signed bill of sale from the dealer I bought the trailer from in 1998, in Florida. Sales receipts weren't good enough. I also tried to title my boat as I have held the title since 1987 from Florida, and they want the hull numbers which long since have fallen off, and they want my signature notarized that this is what happened. PS I turned in my title when I applied for a new one, and this is a 14' john boat mfg'd in 1974.