Not only do you need to have proof of payment for purchasing the vehicle.

Wasn’t this car purchased with a loan? You also need to provide the amount of money remitted from your bank account on each due date of repayment. You enter the car loan company's account for repayment. That is, you go to the bank and print out an account statement. In this way, even if the other party files a lawsuit in court, your account transaction list will be very convincing to the judge.