In addition to the CARspecific purchase and sale agreements, CAR members also have access to the MultiBoard Residential Real Estate Contract. ACCEPTANCE DATE: ("Acceptance Date").SELLER'S INFORMATION: Seller's Signature: Seller's Name (print):. These forms are also available in the DotLoop and DocuSign form libraries. Both the seller and buyer of a vehicle are required to fill out a Car Sale Agreement to ensure a clear, legal, and mutually agreed-upon transaction. To legally transfer the car, you must sign the title over to the buyer. "Signing the title over" means signing on the "Assignment of Title" part of the title. The Electronic Registration and Title (ERT) System allows you to complete and print an Application for Vehicle Transaction(s) (VSD 190). The Illinois bill of sale form approves the exchange of a financial consideration for an item of property into a text register. 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.