To begin, write the date of sale at the top of the document. The correct date refers to the day the receipt was made and the day the sale was made. This is extremely important as it provides to authorities the actual date that the event occurred. Make sure you are using a pen with either blue or black ink. You must use the same pen for the entire receipt and to make a duplicate if requested.
Next, write the description of the vehicle. Include the car's serial number, the identification number, the make and model, its color, as well as any other identifying information you may have. If you buy a car that had items in it, make sure to include that those items were with the car and not forgotten about or stolen. Also include how much was paid for the vehicle.
You will need to leave space near the bottom of the page for signatures. Make sure to include printed names and signatures of the buyer and seller. Having the date written next to the signatures is good to have. If possible, have contact information listed for each person in case one or the party is needed for further identification.
There should be at least one witness in case a conflict arises in the future. Keep in mind, the more witnesses you have the better. It's not necessary to have more than five witnesses though.