As a seller, there are certain things you should know before selling a vehicle, including the process to transfer the title. We're going to be reviewing and going over the as is residential contract some of the best practices builds and clauses in here.I'm new to car financing. What got me confused is that my bank wants purchase agreement or bill of sale before sending out a check to the dealer. You'll need to sign the car purchase agreement (or dealer bill of sale), the title, an odometer statement, and sometimes a damage disclosure statement. If you prefer to buy your vehicle at the dealer, just get pre-approved before you shop and secure your car sale rate.