Open the form and begin by filling in the following blanks: After the sale of the vehicle, the Seller must immediately submit the Seller’s Notice of Sale (VSD-703) and send to the Secretary of State’s office located at:.Once signed, the bill of sale becomes a legally binding contract. The form should include all aspects of the transaction including the full names of all parties, description of the vehicle being sold, and the purchase price amount. Therefore, a purchase and sale agreement for a vehicle must be drafted by the parties involved. There is no issued DMV bill of sale form in the State of Illinois.