Instructions. The new owner's social security number, taxpayer identification number (TIN), or federal employer identification number (EIN) is required. The completed form will include a description of the watercraft, the purchase price, and both parties' signatures.Boat Bill of Sale A form detailing the purchase of a boat from a private seller. Get a bill of sale in New York to be used for any vehicle, horse or general bill of sale record. Forms. New York provides an official document, Form MV-912, on the state's official DMV website. Find out more on a New York bill of sale and how to fill it out. Use a free template or try out our step-by-step creator for customized options.