Free download of car bill of sale is available here. This is a printable 2 pages contract where a copy is for the car buyer, and another copy is for the seller. The vehicle details are important and it is stated clearly in the contract or agreement. The vehicle details are such as the car model, the maker, registration no, VIN# no (a document or numbers that match on car’s body), the MOT certificate, as well as the indicated mileage.