If you would like to authorize someone to drive your car, here is a sample template you can use to write an authorization letter to drive your car.
Subject: Authorization to Drive Car
I, [Name], resident of [Address], hereby authorize [Name] to drive my car in my absence. I would not be able to drive my car because [Mention the reason].
I own a [Mention Car Details] with a vehicle registration number [Number].
I acknowledge, [Authorized person’s Name] owns a driving license, with registration ID [Number] and registration date [Date] and expiry date [Date] to drive the car.
It is requested that you kindly update the information wherever necessary. Also, please feel free to contact me on [Email/contact number] in case of any query concerning this letter.