The California bill of sale form helps individuals document data on a transaction involving the sale, trade, or gift of personal property. A California boat bill of sale is a necessary document that formalizes a legal transfer of ownership.Due to this issue, the exemption may not appear on the current property tax bill for some accounts. The California bill of sale form, REG 135, allows a buyer to purchase a motorized vehicle or vessel in the State. All fields should be filled-in on the form. The form contains the boat's registration number, hull ID number, make, model, and the buyer and seller's signatures. Use our Louisiana bill of sale form in order to legally buy or sell personal property like vehicles in the state of Louisiana. The Louisiana boat bill of sale form is a legal agreement to commemorate the purchase and exchange of a boat for a predetermined dollar value. This step is mandatory because the Office of Motor Vehicles (OMV) needs a bill of sale to register a boat or vehicle. Summary.