Instructions. The new owner's social security number, taxpayer identification number (TIN), or federal employer identification number (EIN) is required. Yes, you need a bill of sale.State the terms and odometer reading on the BOS. A New York motor vehicle bill of sale acts as a record of the purchase and sale of a vehicle between a buyer and a private owner. A detailed description of the process of writing a bill of sale when transferring ownership of a car to a buyer. One of the most important steps in selling your car is the bill of sale. Here is everything you need to know about creating a bill of sale. Edit, sign, and share vehicle purchase agreement with deposit online. No need to install software, just go to DocHub, and sign up instantly and for free. Payment : The bill of sale document should also state the method of payment used such as installments or in full, cash, check, credit card or bank deposit.