The seller's signature is required to be notarized or verified on the Pennsylvania title. This authorization letter allows a representative to transfer ownership of a vehicle on behalf of the lawful owner.This date should be listed numerically. Letter of Authorization is required when an application for a new title, duplicate title, new registration, or new temporary registration is submitted. 7) If you sold, transferred or traded your vehicle; please send PennDOT a copy of the front and back of the Certificate of Title or a bill of sale. Authorized agent services must instruct the applicants to contact their lienholders prior to completing. How to fill out the Letter of Authorization for Vehicle Use? 1. Enter the owner's name and identification number. 2. Simple Bike Ownership Transfer Letter. Date: October 24, 2050.