The sole purpose of this form is to authorize the above named representative to complete the transaction indicated. Edit, sign, and share authorization letter harris county online.No need to install software, just go to DocHub, and sign up instantly and for free. (Personalized Seal). Office of Business Opportunity. Documents and Forms. The Harris County Clerk's office is happy to help you file documents or locate records, but we cannot answer legal questions. The Office of the Texas Secretary of State (the Office) is the only state agency authorized to issue certificates to authenticate Texas public records. Authorization Letter. TS-12. Pdf, Vehicle Specific Authorization Letter. VTR-270.