Form FM-Pat1-100 at a glance
What it is: Petition to Adjudicate Parentage: the Petitioner is the person asking the Court to determine the father of the child or children named in the form.
Who signs: SIGN in the Petitioner's Signature box and add the Date.
A filled-in Form FM-Pat1-100 example: a mother files in Harris County

How to fill out Form FM-Pat1-100, box by box
In the Interest of the following Minor Child(ren)
I am: (Check one.)

I am (Check one). The mother of the child(ren). A man asking the court to determine whether or not I am the biological father of the child(ren). The presumed father of the child(ren), asking the court to determine that I am not the biological father of the child(ren). A relative of the mother, who is deceased: I am the mother's mother, father, grandmother, grandfather, sister or brother. An adult asking the Court to determine my father: I was born on the date you print. An intended parent: A gestational agreement named me the parent of the child(ren).
2. Jurisdiction of the Court

Jurisdiction of the Court (Check one): No court has continuing jurisdiction of this case or the child(ren), and the child(ren) have never been part of any other court case; or this Court has continuing, exclusive jurisdiction of this case and the child(ren), and this Court made prior orders about the child(ren).
3. Child(ren)
3a. Does a court order name the father of the child(ren)?
3b. Has someone signed an “Acknowledgment of Paternity” claiming to be the father?

Has someone signed an “Acknowledgment of Paternity” claiming to be the father? (Check one.) The child(ren) do not have an acknowledged father: no one has signed an Acknowledgment of Paternity claiming to be the father of these child(ren). The child(ren) do have an acknowledged father: someone has signed and filed an Acknowledgment of Paternity claiming to be the father of these child(ren).
3c. Do the child(ren) have a presumed father?
4. Respondents: People Who Must Get Legal Notice of this Case

Respondents: People Who Must Get Legal Notice of this Case. You must give legal notice of this case to the mother; any alleged father or fathers; any adjudicated, acknowledged, or presumed father; anyone who filed a notice of intent to claim paternity of the child(ren) with the paternity registry; and anyone with a court-ordered relationship with any of the child(ren).
Respondent A: Mother
How each Respondent is served

(Check one.) I will have a sheriff, constable, or process server give a copy of this Petition to the mother of the child(ren) here. I ask the clerk to issue citation. I understand that I will need to pay a fee (or file the form to show the Court that I am unable to pay the fee) and arrange for service. Or service by a sheriff, constable, or process server is not necessary, at this time: I will give a copy of this Petition to the mother and I believe she will sign a Waiver of Service, or file an Answer. Or I ask that this Respondent be served by publication: I will file the required affidavits for service by publication. I understand I must hire an attorney ad litem to represent this Respondent.
Respondent B: Alleged Father
Respondent C: Presumed, Acknowledged or Adjudicated Father

Respondent C: Presumed, Acknowledged or Adjudicated Father. Check this box if there is no presumed, acknowledged, or adjudicated father of the child(ren) or you are the presumed father and skip to Respondent D. Respondent C's full name is: PRINT the Presumed, Acknowledged, or Adjudicated Father's full name.
Respondent C is (Check one): a presumed father. Respondent C was married to the mother when the child(ren) you list were born or conceived or during the first two years of each child's life, Respondent C continuously lived with the child(ren) you list and represented to others that the child(ren) were his own. Or an adjudicated father. A court order named Respondent C as the father of the child(ren). Or an acknowledged father. Respondent C signed an Acknowledgment of Paternity claiming to the father of the child(ren).
Respondent D: Paternity Registrant
Respondent E: Court-Ordered Relationships

Respondent E: Court-Ordered Relationships. Check this box if there are no court orders for custody or guardianship of the child(ren) or other court ordered relationships affecting the child(ren), and skip to Respondent F. PRINT the full name(s) of anyone with a court ordered relationship with the child(ren).
5. Out-of-State Respondents
6. Biological Testing (Check one.)
7. Paternity
8. Conservatorship, Possession and Access, and Support

Conservatorship, Possession and Access, and Support (Check one): I am not asking the Court to make orders for conservatorship (custody), possession of and access to the child(ren), child support, or medical support at this time. (If you check this box, skip to section 9.) Or I ask the Court to make orders for conservatorship, (custody) possession of and access to the child(ren) (visitation), child support, and medical support for the child(ren).
If your child(ren) have ever received Medicaid or TANF
16. Certificate of Service to the Office of the Attorney General (OAG)

Certificate of Service to the Office of the Attorney General (OAG): Sign only if your child(ren) receive (or have received) Medicaid or TANF.
“I certify that a true copy of this Counter-Petition was served on the Office of the Attorney General Child Support Division* in person, by certified and first-class mail, by commercial delivery service, by fax, by email, or through the electronic file manager on this date.”
Sources
[1] Form FM-Pat1-100, Petition to Adjudicate Parentage (Rev. 02-2024), TexasLawHelp.org (the Official source link on this page).














