It serves as proof of a legal change of ownership and reflects details of the sale like the vehicle's age and condition at the time of purchase. The Illinois bill of sale form approves the exchange of a financial consideration for an item of property into a text register.Motor Vehicle Bill of Sale – Use to sell, purchase and change ownership of an automobile. Motor Vehicle Bill of Sale Drafted upon the sale of a used vehicle to provide evidence of the transfer of ownership. Download: PDF, Word (. Basic bill of sale form in Illinois to be used as general BOS document and customize the sale contract as per your transactions and requirement. Use our Illinois bill of sale forms to legally buy or sell personal property in the state of Illinois, including a car, firearm, or trailer. Illinois requires bills of sale to be notarized to obtain legal value. Get high-quality Used Auto Bill of Sale forms for private vehicle deals. Instantly downloadable and printable for your convenience.