If you would like to transfer your car, here is a sample template you can use to write an authorization letter by vehicle owner.
Subject: Authorization of Vehicle Owner
I, [Name], resident of [Address], hereby authorize [Name] to take vehicle ownership of my [Mention the vehicle details] with a vehicle registration number [Number]. I confirm this ownership transfer as I have sold the same to [Name] on [Date].
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.
You are requested to note this information for any future references. In case you have any doubt regarding this authorization letter, kindly reach me at [Email/contact number]