Mention the price agreed upon mutually by both the parties. The official title of the vehicle, up-to-date registration certificate of the vehicle, its identification number, make, model and year of purchase and the bill of sale should be the most important documents to be present while you are making a sale or buying the vehicle. This step includes details of the vehicle and basic information about it. Both the parties have to sign on the bill to make it legal for the sale to take place. These details include- the legal names of both, address and contact details. It is very important that you fill in all the necessary details of both the buyer and the seller of the vehicle. Prepare a Vehicle Bill of Sales in 5 Steps Step 1: Details/Information of Both Parties