"(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. An Acknowledgement of Paternity (AOP) allows parents who aren't married to establish legal paternity.Learn more about the AOP process and how to file. An Acknowledgment of Paternity (AOP) is a legal document that allows parents who aren't married to establish legal paternity. I. Form for Ordinary Certificate of Acknowledgment. Letter of Acknowledgement (LOA) Request Form. Federal Building, 727 E. Cesar E. Chavez Blvd, Suite B-124, San Antonio, Texas 78206. Downloadable forms for eFiling, Divorces, and Suites Affecting the Parent-Child Relationship, Child Support, Hail Claims, Legal, LegalEase, and Passports. Unnecessary hardship is present only where, in the absence of a variance, no reasonable use may be made of the property. 3.