The sole purpose of this form is to authorize the above named representative to complete the transaction indicated. Vehicle Specific Authorization Letter.Please complete this printable form online or write legibly in blue or black ink ONLY, within the lines provided. 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. How to fill out the Harris County Tax Office Authorization Form? 1. Enter business or individual's name. 2. "(Personalized Seal)" in the following examples means a seal containing the words "Notary Public, State of Texas" around a star of five points, the notary. Please to do not modify the form other than completing the fillable fields. The European powers soon followed the U.S. example and drew up their own treaties with Japan.