To transfer a vehicle from a seller to a buyer in a private sale, you can use the Vehicle Bill of Sale (PDF) (MV-912). This form certifies the purchase price and determines the sales tax you must pay when registering the vehicle.This form below is designed for use on upon the sale of a motor vehicle or automobile. Such a bill of sale is needed to confirm a party's ownership in the car. Any person buying or accepting a car in New York must: Sign the bill of sale; Pay sales tax or present proof of exemption; Register and title the vehicle. What should you include in your vehicle bill of sale? When selling a car in New York, both the buyer and seller must complete a Statement of Transaction (DTF802) form to certify the sale and transfer of ownership.