A copy of the registered owner's valid U.S. State issued Driver License or Personal Identification Card or Federal Identification is required. 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. Please complete this printable form online or write legibly in blue or black ink ONLY, within the lines provided. If you have any questions or need assistance completing the Authorization, you can call (713). 970-7330. If you have any questions or need assistance completing the Authorization, you can call (713). 970-7330. The following forms are available for downloading, printing and completing. Authorization Form Letter PDF Download bsignetics com. Effective January 1, 2014, the Supreme Court of Texas mandated that all attorneys must electronically file court documents in the Harris County Probate Courts. A) execute a special power of attorney in his favour authorizing him to receive the said important documents on your behalf.