Typically, you will asked for the following information: VIN. description of the vehicle, such as its make, model, year, and color. date of the sale or title transfer. license plate number. odometer reading. new owner's name and contact information. your name and contact information.
Contact the Dealership: Reach out to the dealership as soon as possible. Explain your situation and express your desire to cancel the deal. If you haven't taken delivery of the vehicle, they may be more willing to accommodate your request.
You can drive the vehicle with a proof of sale (also being on the title's tear off page) for a few days. The title has to be issued to the owner before being able to be driven AND insured.