An Illinois motor vehicle bill of sale legally transfers ownership of a car or other motor vehicle in the state of Illinois. A Bill of Sale acts as a sales contract documenting the sale of the vehicle.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. Get Illinois bill of sale forms and learn how to transfer ownership of vehicles, boats, firearms, and other personal property from one party to another. 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. How to fill out the Vehicle Bill of Sale Agreement Template? 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. The Electronic Registration and Title (ERT) System allows you to complete and print an Application for Vehicle Transaction(s) (VSD 190).