Establishing paternity in Texas happens one of two ways: both parents sign a Voluntary Acknowledgement of Paternity, or a court orders genetic testing and enters a ruling. Until one of those happens, an unmarried father has no legal right to custody, and a mother has no enforceable path to child support. What counts as a valid acknowledgement, how Brazoria, Fort Bend, and Galveston County courts handle contested cases, and what the process actually looks like are the essentials you need to understand before you sign anything or file.
Paternity is not assumed, even when a father has been present since birth. He has no legal standing until paternity is established through one of the paths Texas law recognizes. At Scott M. Brown & Associates, our board-certified family law attorneys help parents on both sides of this process protect their rights and their children, from our offices in Angleton, Pearland, League City, and Sugar Land.
The Legal Standard: How Texas Recognizes Legal Paternity
Texas law recognizes a father-child relationship in one of several ways, most commonly through an unrebutted presumption of paternity, a signed Voluntary Acknowledgment of Paternity, or a court adjudication. [1] A presumption of paternity arises automatically if the man is married to the mother when the child is born, or if the child is born within 300 days after that marriage ends. Tex. Fam. Code § 160.204.
Biology alone does not create legal rights or obligations. A man can be a child’s biological father and still have no standing to seek custody, and no support order can be entered against him, until paternity is legally established.
Why Establishing Paternity Matters
For fathers: no signed acknowledgment or court order means no standing to seek custody, parenting time, or a say in major decisions about your child.
For mothers: without established paternity, there is no legal father a court can order to pay support, and no formal record of who that support should come from.
For children: established paternity secures the right to financial support and inheritance, and puts a complete legal record behind who their parents are.
The Two Paths to Establishing Paternity
Which path applies depends on whether both parents agree.
Voluntary Acknowledgment of Paternity
When both parents agree on paternity, they can sign a Voluntary Acknowledgement of Paternity (AOP), often at the hospital when the child is born, and file it with the Texas Department of State Health Services, Vital Statistics Unit. Tex. Fam. Code §§ 160.301, 160.302. Once filed, it carries the same legal weight as a court order, with no further court approval required.
Either parent can rescind the acknowledgment, but only within 60 days of signing or the date of a related court proceeding, whichever comes first. Tex. Fam. Code § 160.307. After that window closes, it can only be challenged in court for fraud, duress, or a material mistake of fact.
Court-Ordered Paternity
When parents disagree, or one parent won’t sign, paternity has to be established through the courts.
A parent, the child, or the Office of the Attorney General can file a petition to adjudicate parentage. Venue belongs in the county where the child lives, or where the alleged father lives if the child is not in Texas. Tex. Fam. Code § 160.605. The court can then order genetic testing for the mother, child, and alleged father. Tex. Fam. Code § 160.502.
If paternity comes up inside an active child support case through the Office of the Attorney General, Texas’s child support review process can address paternity as part of that same administrative proceeding before it ever reaches a district judge. Tex. Fam. Code ch. 233.
Genetic Testing: What Texas Law Requires
Court-ordered genetic testing is not the same as an over-the-counter kit. Texas law requires a lab report signed under penalty of perjury by the testing laboratory, and a report that meets this standard is self-authenticating, admissible without additional testimony. Tex. Fam. Code § 160.504.
Test results showing at least a 99 percent probability of paternity, with a combined paternity index of 100 to 1 or higher, create a rebuttable identification of the man as the father. [2] That identification can only be rebutted by producing other qualifying genetic testing that excludes him or identifies another man, not simply by disputing the outcome.
Refusing to appear for court-ordered testing carries real consequences. Texas courts can enforce a testing order through contempt, and can adjudicate parentage against the position of a parent who refuses to comply. Tex. Fam. Code § 160.622.
A Texas Difference: Paternity by Conduct
Some states treat a father’s conduct, such as living with a child and holding him out as his own, as evidence of paternity only for narrow purposes like inheritance. Texas folds this conduct directly into its main presumption instead. If a man continuously resided with a child during the first two years of the child’s life and represented to others that the child was his own, that conduct alone triggers the full presumption of paternity, not a narrower, benefits-only finding. [3]
That distinction matters. In Texas, holding a child out as your own can carry the same legal weight as a signed acknowledgment or a marriage-based presumption, with the same custody and support consequences attached.
Contesting Paternity: A Separate and More Complex Process
Establishing paternity isn’t always the goal. If you were named as a father in error, signed an acknowledgment under pressure, or learned new information after the fact, Texas law gives you a narrower path to challenge an existing finding of paternity. That process runs on its own strict deadlines and burden of proof. Contesting an existing finding is a different legal question than establishing one, and it deserves its own conversation with an attorney before you act.
How Establishing Paternity Works in Our Texas Courts
Step 1: Consult with an attorney. We help you understand which path applies to your situation before you sign anything or file.
Step 2: Sign the Voluntary Acknowledgment, if uncontested. Both parents sign, often at the hospital, and it’s filed with the Vital Statistics Unit.
Step 3: File a Petition to Adjudicate Parentage, if contested. The petition is filed in the county where the child lives.
Step 4: Serve the other party. Proper service is required to move the case forward.
Step 5: Attend the hearing. Or, if a support case is already open with the Attorney General, the review process addresses paternity first.
Step 6: Complete genetic testing, if ordered. Testing happens at a certified lab under a documented chain of custody.
Step 7: Receive the court’s order. Once paternity is legally established, custody and support proceedings can move forward on their own timeline.
Time-Sensitive Situations in Paternity Cases
Paternity cases don’t come with an emergency-order process the way custody disputes sometimes do, but timing still matters. A man who believes he may be a child’s father, but isn’t yet legally recognized, can protect his right to notice of any future adoption or termination proceeding by registering with the Texas paternity registry before the child’s birth or within 31 days after. Tex. Fam. Code § 160.402. Waiting too long to register can mean losing that notice altogether.
Ignoring a paternity action carries its own risk. A court can hold a parent in contempt, or adjudicate parentage against a parent who is served but refuses to appear for testing, closing the door on further dispute.
If a child already has a presumed father, a man seeking to prove that he, not the presumed father, is the biological parent generally must file suit before the child’s fourth birthday. [4] Missing that window can permanently bar the claim, outside a narrow set of exceptions.
When the Other Parent Won’t Cooperate
If the mother won’t sign the acknowledgement, the voluntary path is closed, and paternity has to be established through the courts instead. If the alleged father won’t appear for court-ordered testing, the court can hold him in contempt or adjudicate parentage against him. Tex. Fam. Code § 160.622. In cases where testing isn’t possible, the holding-out standard described above can sometimes support a finding of paternity based on conduct, but it is not a substitute for genetic testing when custody or support is what’s actually at stake.
Establishing Paternity Affects Custody and Child Support
Once paternity is on the record, both parents can move forward on separate footing. A father with established paternity can pursue a custody arrangement based on his legal status, not informal access. A mother can move forward with a support case calculated the same way it would be for any other Texas parent, including retroactive support that can reach back up to four years in many cases. Tex. Fam. Code § 154.131.
If your case will involve child support once paternity is resolved, our 2026 Texas Child Support Calculator, linked under Related Topics below, can help you understand what’s realistically at stake before you ever set foot in a courtroom.
Neither of those follow-on cases can proceed, though, until paternity itself is settled first.
How Scott M. Brown & Associates Can Help
Paternity cases are won on preparation, and on understanding which path actually fits your situation before you act.
Three of our attorneys are board certified in family law by the Texas Board of Legal Specialization, a distinction less than 1% of practicing Texas attorneys hold. Our firm of seven attorneys is the largest family law practice in Brazoria County, with offices in Angleton, Pearland, League City, and Sugar Land.
What you get when you work with us:
- A direct assessment of your situation: we tell you honestly which path applies and what the realistic range of outcomes looks like.
- Careful handling of sensitive family circumstances: paternity cases carry weight far beyond a single hearing, and we treat them that way.
- Aggressive courtroom advocacy when a case is contested: we fight to protect your rights as a parent.
- Clear, consistent communication: we return calls, answer questions, and keep you informed at every stage.
- A proof-first approach: you can review outcomes we’ve achieved for Texas families in our case results, linked under Related Topics below, not just promises.
Get the help you need. Call (979) 652-5246 or contact us online to schedule a consultation. We will give you a straight read on your situation from the first call.
Frequently Asked Questions
How long does it take to establish paternity in Texas?
It depends on the path. A Voluntary Acknowledgment of Paternity can be completed the same day both parents sign it. A contested court case can take several months, especially when genetic testing and a hearing are required.
Can a father get custody before paternity is established?
No. Texas courts won’t award custody or visitation to a man who hasn’t yet established paternity, no matter how involved he has been in the child’s life. Establishing paternity is the first legal step, not an afterthought.
What if the mother won't sign the Acknowledgement of Paternity?
If she won’t sign, the acknowledgment process is closed to you, and paternity has to be established through the courts instead. That typically means filing a petition to adjudicate parentage and going through court-ordered genetic testing.
Can a signed Acknowledgment of Paternity be undone later?
Only within a narrow window. Either parent can rescind it within 60 days of signing, or before a related court proceeding, whichever comes first. After that, undoing it requires proving fraud, duress, or a material mistake of fact in court.
Can paternity still be established if the father isn't on the birth certificate?
Yes. Leaving a father off the birth certificate at birth doesn’t waive anyone’s right to establish paternity later. A Voluntary Acknowledgment can still be signed, or a parent can file a petition in court.
Does establishing paternity automatically create a custody or support order?
No. Establishing paternity confirms who the legal father is. Custody and child support each require their own separate petition and order once paternity is on the record.
Related Topics
- Texas Child Support Calculator, which estimates the support a Texas court is likely to order once a legal father is on record.
- Case Results, which shows outcomes we’ve achieved for Texas families in family law matters, including contested parentage.
- Custody Scheduling in Angleton, which covers how parenting time is typically structured once paternity and custody are resolved.
Talk With a Paternity Lawyer in Texas
At Scott M. Brown & Associates, our family law attorneys provide thorough, knowledgeable, and dedicated representation for parents establishing paternity in Texas.
Meet the attorneys handling paternity, custody, and support cases across our Texas offices.
Office hours, locations, and directions for our Angleton, Pearland, League City, and Sugar Land offices are available if you’re planning a visit.
