I understand that this vehicle is sold in "as is, where is" condition, with no guarantees or warranties. Buyer's signature. Date.A vehicle sales agreement is a lawful arrangement summarizing the terms and conditions of a vehicle sale between a customer and a seller. This car purchase agreement template is a standard agreement made completely customizable for your individual needs. Below, we've outlined the five steps and forms required for how to sell a car in the state of Utah. 1. Enter the car details including make, model, and registration number. Information regarding registration and title delivery requirements for motor vehicle sales. A marketing and promotion agreement is a contract between a marketing agency and client where the latter procures the former's services under certain terms. Fill out the seller's information and buyer's information sections. 3. Complete the certificate of purchase section with the agreed sale price. 4.