In addition to the value-based property tax, an annual local registration fee is imposed on all vehicles filed with Fairfax County. A Virginia motor vehicle bill of sale is used to transfer ownership of a motor vehicle in the State of Virginia.Get a Virginia motor vehicle bill of sale form to capture the necessary transaction information and transfer vehicle ownership. Motor Vehicle Bill of Sale – Use this document to prove the legal sale and purchase of a motor vehicle in the state of Virginia. Signed contract for a car in VA, filled out all of the paperwork, but afterwards decided to not go through with the purchase.