An Illinois motor vehicle bill of sale documents the purchase and sale of a motor vehicle between a private seller and buyer in the State of Illinois. The Illinois bill of sale form approves the exchange of a financial consideration for an item of property into a text register.Illinois bill of sale forms are documents that provide information about the sale, purchase, or trade of property. Forms on this website are PDFs with fillable fields. Forms should be downloaded to your computer before filling in the fields. If a lien is connected to the vehicle, you must supply the name and address of any lienholders. This Bill of Sale is an affidavit of the amount of money that was exchanged between the seller(s) and buyers(s) for the vehicle listed below. 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. You need to use a bill of sale for car Illinois whenever you want to sell or buy a vehicle, whether new or used, in the state of Illinois. Northern Illinois Federal Credit Union, at address: 817 W Lincoln Hwy, Suite E, DeKalb, IL 60115, as the lien holders. Seller(s).