MV-912: Vehicle Bill of Sale (PDF). English. Use this form to show proof of a vehicle ownership transfer through a private sale. Download.The completed form will include a description of the watercraft, the purchase price, and both parties' signatures. A New York Trailer Bill of Sale helps streamline the registration process and proves the transfer of ownership if a dispute arises. Create a customized New York Bill of Sale document with our professionally written legal template. Begin now to generate your own personalized form.