Section 161.005 Limitations Bars Mistaken Paternity Relief | In re N.A.T. (2026)

In the Interest of N.A.T., a Child, 05-25-00786-CV, June 12, 2026.

On appeal from 303rd Judicial District Court, Dallas County, Texas

Synopsis

Texas Family Code § 161.005(e) barred the father’s mistaken-paternity petition because the trial court could reasonably find he was aware of facts indicating nonpaternity years before he filed suit. Because limitations defeated the claim at the prima facie stage, § 161.005(f) did not require the trial court to order genetic testing.

Relevance to Family Law

This opinion matters well beyond a mistaken-paternity fact pattern. In post-divorce modification practice, support enforcement, and adult-disabled-child support litigation, it confirms that a parent cannot revive long-dormant paternity suspicions as a defensive response to an unfavorable modification request. For family-law litigators, the case is a reminder that paternity finality, limitations, issue preservation, and pretrial evidentiary development can decide support exposure before the merits of biological parentage are ever reached.

Case Summary

Fact Summary

The parties divorced in 2009. In the divorce proceeding, Mother alleged the parties were the parents of two children born during the marriage, including N.A.T., who was born in 2006. Father answered and, notably, sought genetic testing during the divorce. The trial court granted that request and ordered testing to be completed at Father’s expense, but Father did not complete the testing and did not appear for trial. The court then entered a default divorce decree adjudicating the parties as the child’s parents and ordering child support.

In January 2024, just before N.A.T. turned eighteen, Mother filed a modification action seeking continued support under Family Code § 154.302(a) based on the child’s disability and need for substantial care and personal supervision. Father responded with multiple filings, including renewed requests for genetic testing and a petition to terminate the parent-child relationship based on mistaken paternity under Family Code § 161.005.

At the statutorily required pretrial hearing, Father attempted to establish that his mistaken-paternity claim was timely by affidavit and testimony asserting that he first learned on December 18, 2023, from one of Mother’s relatives that he was not the child’s biological father. But other evidence undercut that timeline. Father testified that he had suspected nonpaternity since the child’s birth, believed Mother had been unfaithful, questioned the gestational timeline, sought court-ordered genetic testing in 2009, and even performed an at-home DNA test in 2012, albeit with inconclusive results. Mother also testified Father was the biological father, and the record reflected that in December 2023 Father signed a probate affidavit acknowledging he was properly named as the father in a guardianship proceeding involving the child.

The trial court denied Father’s request for genetic testing and denied his mistaken-paternity relief. It later granted Mother’s modification request, increased support, and ordered support to continue beyond age eighteen because of the child’s disability. Father appealed, challenging among other things the denial of genetic testing, asserting due process violations, and alleging judicial bias.

Issues Decided

• Whether Father’s June 10, 2024 petition to terminate the parent-child relationship based on mistaken paternity was barred by the two-year limitations period in Texas Family Code § 161.005(e).
• Whether the trial court was required under Texas Family Code § 161.005(f) to order genetic testing despite evidence supporting a limitations bar.
• Whether Father preserved his due-process complaint regarding the final trial.
• Whether the record showed a due-process violation from the trial court’s refusal to revisit at final trial the mistaken-paternity matter already decided at the pretrial hearing.

Rules Applied

The court centered its analysis on Texas Family Code § 161.005, which creates a limited statutory mechanism for terminating the parent-child relationship based on mistaken paternity. The opinion emphasizes several features of that statute:

• Under § 161.005(c), a man may seek termination if he signed an acknowledgment of paternity or was adjudicated the father in a prior proceeding in which genetic testing did not occur.
• Under § 161.005(e), the petition must be filed no later than the second anniversary of the date the petitioner becomes aware of facts indicating he is not the child’s genetic father.
• Under § 161.005(f), the trial court must conduct a pretrial hearing to determine whether the petitioner has established a meritorious prima facie case for termination; if so, the court shall order genetic testing.
• Under § 161.005(h), if testing excludes the petitioner, the court shall terminate the parent-child relationship.

On the limitations question, the court treated the date of awareness as a fact issue for the trial court, citing by analogy Childs v. Haussecker, 974 S.W.2d 31, 44 (Tex. 1998), from the discovery-rule context. The opinion also relied on mistaken-paternity cases holding that the trial court may resolve credibility disputes and infer awareness from prior conduct and prior suspicions, including In re Z.L.M.C., No. 04-19-00759-CV, 2020 WL 1866463, at 3 (Tex. App.—San Antonio Apr. 15, 2020, no pet.) (mem. op.), and In re D.I.P.*, 421 S.W.3d 106, 109 (Tex. App.—San Antonio 2013, pet. denied).

On preservation, the court applied Texas Rule of Appellate Procedure 33.1 and reiterated that even constitutional complaints, including due-process complaints, are waived if not presented to the trial court. It cited In re L.M.I., 119 S.W.3d 707, 711 (Tex. 2003), among other authorities, and noted that pro se litigants are held to the same procedural rules as licensed attorneys.

Application

The Dallas Court of Appeals treated the case as turning on limitations, not biology. That framing is important. Father argued he was entitled to genetic testing because § 161.005(f) says the court “shall” order testing once a meritorious prima facie case is shown. But the court read the statutory sequence to require more than a bare allegation of nonpaternity. A petitioner must first clear the prima facie threshold, and a petition defeated by limitations is not meritorious.

The record gave the trial court ample room to find Father’s petition untimely. His own testimony established that he had concerns about paternity at or near the child’s birth, believed Mother had engaged in infidelity, questioned whether the timing of conception was compatible with his paternity, affirmatively sought genetic testing in 2009 during the divorce, and pursued informal testing in 2012. Those facts supported an inference that Father was aware of facts indicating nonpaternity long before June 10, 2022, which was the latest possible awareness date if his June 10, 2024 petition were to be timely.

The appellate court deferred to the trial court’s implied fact findings because no findings of fact or conclusions of law were requested or filed. That procedural posture favored affirmance. The trial court was free to disbelieve Father’s testimony that he first learned the relevant facts in December 2023 from an unnamed relative, especially when that testimony conflicted with his earlier conduct and with other record evidence, including his December 19, 2023 guardianship-related affidavit acknowledging he was properly named as the father.

On due process, Father’s appellate theory failed first on preservation. At trial he disagreed with the court’s ruling and stated he had a witness, but he did not lodge a due-process objection or otherwise make the constitutional complaint known to the court with sufficient specificity. The court therefore found waiver under Rule 33.1. The opinion further indicates that, even if preserved, there was no due-process violation because Father had notice and was heard at the pretrial hearing designated by statute for deciding whether genetic testing should be ordered.

Holding

The court held that Father’s mistaken-paternity petition was untimely under Texas Family Code § 161.005(e). The trial court could reasonably find that Father became aware of facts indicating he was not the child’s genetic father years before he filed his June 2024 petition, based on his long-standing suspicions, his 2009 request for court-ordered testing, and his 2012 at-home DNA effort.

The court also held that § 161.005(f) did not compel genetic testing where the evidence supported a limitations bar. Because Father failed to establish a meritorious prima facie case for termination, the statutory prerequisite to mandatory testing was not met.

The court further held that Father did not preserve his due-process complaint for appellate review because he did not present that complaint to the trial court. And to the extent the argument could be considered on the merits, the record did not show a denial of due process from the trial court’s refusal to relitigate at final trial the mistaken-paternity issue already resolved at the pretrial hearing.

Practical Application

For Texas family-law litigators, this case should reshape how you evaluate late-stage paternity challenges in modification proceedings. If a support obligor raises nonpaternity only after a request for increased support, continued support for a disabled adult child, or enforcement pressure, the first question is not whether testing might be informative. The first question is limitations: when did the client become aware of facts indicating nonpaternity? The answer will often be found in prior pleadings, discovery responses, emails, text messages, prior testing efforts, divorce-trial conduct, or even casual admissions.

The case also underscores that § 161.005(f)’s genetic-testing mechanism is not self-executing. Practitioners representing petitioners must prove a timely prima facie case before testing becomes mandatory. Practitioners defending against the petition should develop the limitations record aggressively at the pretrial hearing because that hearing may effectively end the mistaken-paternity claim before any test is ordered.

This opinion is also highly relevant in divorce and post-divorce litigation where paternity was adjudicated in a decree without testing. A litigant who suspected nonpaternity during the divorce but failed to pursue testing, failed to comply with a testing order, or defaulted may have effectively forfeited later mistaken-paternity relief if more than two years elapsed after awareness-triggering facts emerged. That has direct implications for child support strategy, modification exposure, and settlement leverage.

Finally, the opinion is a preservation case. If a party contends the court curtailed the presentation of evidence, bifurcated issues improperly, or denied a meaningful hearing, counsel must say so clearly, on the record, and obtain a ruling. Appellate courts will not convert a general disagreement with the trial court into a preserved constitutional complaint.

Checklists

Evaluating a Mistaken-Paternity Limitations Defense

• Identify the exact filing date of the § 161.005 petition.
• Work backward two years to determine the latest date on which awareness could have arisen.
• Collect all evidence showing the petitioner previously suspected nonpaternity.
• Review prior divorce, SAPCR, modification, and enforcement filings for references to paternity concerns.
• Determine whether the petitioner previously requested genetic testing in court.
• Determine whether any private or at-home testing was attempted.
• Look for communications or testimony concerning infidelity, conception timing, birth timing, or other facts allegedly indicating nonpaternity.
• Assess whether the petitioner made inconsistent statements acknowledging paternity in other proceedings.

Building a Timely Prima Facie Case for the Petitioner

• Plead the § 161.005 claim with specific dates and facts supporting timeliness.
• Prepare an affidavit identifying when the petitioner first became aware of facts indicating nonpaternity.
• Corroborate that timeline with documents, witnesses, or communications.
• Anticipate impeachment from older pleadings, motions, or testing efforts.
• Explain why earlier suspicions did not amount to awareness-triggering facts, if that is the theory.
• Request findings of fact and conclusions of law if timeliness is contested.
• Preserve all evidentiary and procedural objections at the pretrial hearing.

Opposing Genetic Testing Under § 161.005(f)

• Emphasize that testing is required only after a meritorious prima facie case is established.
• Frame limitations as part of the prima facie failure.
• Offer evidence of prior awareness, not merely prior adjudication.
• Use the petitioner’s own prior conduct to establish awareness.
• Highlight failures to complete previously ordered testing.
• Develop credibility attacks where the petitioner claims a recent “discovery” date.
• Argue that an untimely petition is legally non-meritorious, making testing unnecessary.

Protecting the Record in Modification and Support Proceedings

• Clarify on the record which issues are being heard at the pretrial stage and which remain for final trial.
• If the court refuses additional evidence, make an offer of proof.
• State any due-process objection expressly and specifically.
• Obtain a ruling on the objection.
• Request findings of fact and conclusions of law after an adverse ruling on a disputed fact issue.
• Ensure the clerk’s record includes all petitions, affidavits, prior orders, and exhibits relevant to timeliness.
• Ensure the reporter’s record captures all colloquy regarding whether an issue has been finally decided.

Avoiding the Non-Prevailing Party’s Mistakes

• Do not ignore or abandon court-ordered genetic testing in the original divorce or parentage case.
• Do not assume a later support modification will reopen paternity questions.
• Do not rely solely on an unsupported affidavit naming a confidential source for recent discovery.
• Do not overlook your client’s earlier statements or filings that may prove prior awareness.
• Do not fail to preserve constitutional complaints with a clear trial-court objection.
• Do not proceed to appeal without requesting findings when the ruling rests on implied fact findings.

Citation

In the Interest of N.A.T., a Child, No. 05-25-00786-CV, 2026 WL ___ (Tex. App.—Dallas June 12, 2026, no pet.) (mem. op.).

Full Opinion

Read the full opinion here

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