Stay Pending Mandamus: When a Retroactive Deadline and an Out-of-State Doctor Nearly Decided a Texas Will Contest

A parent dies and two pieces of paper show up, each claiming to be the last word on who gets what. One child produces a will signed years ago. Someone else produces a will signed shortly before the death. Both cannot be right, and the fight that follows is rarely about money alone. It is about which version of a parent’s wishes a Texas court will honor.

In fights like that, procedure often decides more than the facts do. A contestant who cannot get the competing will in front of the jury has lost before anyone reaches the merits. That can happen because a pleading gets struck on a technicality, or because the expert who would testify about the parent’s mental condition gets barred from the witness stand. Can a trial court impose a filing deadline after the fact and then strike a pleading for missing it? Can it exclude a doctor’s opinion on a decedent’s capacity just because the doctor is not licensed in Texas?

Both questions came to the Austin Court of Appeals in In re Ybarra, No. 03-26-00497-CV (Tex. App.—Austin June 24, 2026, orig. proceeding) (order) (per curiam). The court was not deciding the mandamus petition yet. It was deciding whether to stop the trial while it considered the petition. That decision required the court to take a hard preliminary look at both rulings, and what it said tells you a lot about how appellate courts handle a will contest that has gone sideways in the trial court.

Facts & Procedural History

The case concerns the estate of Juan Rosales Perez. Lawrence Perez, the real party in interest, filed an application in a Travis County probate proceeding to admit a purported 2022 will to probate. Adelide Ybarra and Leon Barba disagreed. They contended an earlier 2018 will should control, and on February 11, 2026, they filed a pleading seeking to probate that 2018 will instead.

The trial court then signed a docket-control order on February 17, 2026 — six days after Ybarra and Barba filed. Lawrence Perez moved to strike the February 11 pleading based on that later-signed order, and the trial court granted the motion. Ybarra and Barba were left with no live pleading through which to put the 2018 will before the court.

A second ruling made things worse. Ybarra and Barba had retained a medical doctor to testify about whether the decedent was of sound mind when the 2022 will was signed. The trial court excluded that testimony entirely and forbade them from even deposing their own expert. The record of the oral hearing behind that order makes clear why: the trial court believed a physician who is not licensed in Texas cannot give legally sufficient expert testimony on a testator’s sound mind.

Both orders were signed on April 14, 2026, and filed by the county clerk the next afternoon. Ybarra and Barba asked the trial court to reconsider the order striking their pleading on April 20. The trial court denied that motion on May 21. A week later, on May 28, they filed a mandamus petition in the Third Court of Appeals along with a motion for temporary relief under Rule of Appellate Procedure 52.10, asking the court to stay the trial on Lawrence Perez’s application while the mandamus proceeding was pending. The court entered an administrative stay on May 29 so it could consider the motion, and it granted the stay itself on June 24.

How a Stay Pending Mandamus Actually Works

To understand what the court did here, you first have to understand what a relator can ask for while a mandamus petition is pending. Texas Rule of Appellate Procedure 52.10(a) lets a relator “file a motion to stay any underlying proceedings or for any other temporary relief pending the court’s action on the petition.” Subsection (b) says “[t]he court — on motion of any party or on its own initiative — may without notice grant any just relief pending the court’s action on the petition,” and that “[u]nless vacated or modified, an order granting temporary relief is effective until the case is finally decided.” That last piece matters more than it looks. A Rule 52.10 stay is not a short pause. It runs until the mandamus proceeding is over.

An administrative stay is a different animal, and the difference tripped up one of the parties here. An administrative stay just freezes the clock so the appellate court has time to read the papers and rule. It says nothing about who is likely to win. As the Texas Supreme Court put it in In re State, 711 S.W.3d 641, 643 n.2 (Tex. 2024), administrative stays “do not typically reflect the court’s consideration of the merits of the stay application.” They “freeze legal proceedings until the court can rule on a party’s request for expedited relief.”

So what does a relator have to show to get the real thing? In re State gives two considerations. First, “the likely merits of the parties’ respective legal positions are always an important consideration” — a court will not freeze a trial for a party whose mandamus claim looks weak. Second, the court equitably balances “the injury that will befall either party depending on the court’s decision” against “the harm that other parties or the public will suffer if relief is granted,” including any injury to non-parties. In a will contest, that second factor usually turns on whether going to trial without a needed pleading or without key expert testimony causes harm that an ordinary appeal cannot undo.

What a Will Proponent Has to Prove, and Why the Doctor Mattered

The expert ruling only makes sense against the backdrop of what anyone offering a will has to prove. Texas Estates Code Section 256.152(a)(2)(B) says an applicant for probate of a will that is not self-proved must prove to the court’s satisfaction that “at the time of executing the will,” the testator “was of sound mind.” Texas courts treat “sound mind” and “testamentary capacity” as the same thing. Duke v. Falk, 463 S.W.2d 245, 254 (Tex. App.—Austin 1971, no writ), says it plainly: “The terms testamentary capacity and sound mind in cases involving validity of a will mean the same thing.”

In practice that means the fight is about what was going on in someone’s head on the day they signed — whether they understood the act they were performing, what they owned, who would naturally expect to inherit, and how those pieces fit together. That is a question about a person’s mental condition, and proving it almost always takes a physician who can speak to the testator’s cognitive state at or near the signing. A family member saying the testator seemed confused does not carry the same weight as a clinical assessment grounded in medical records. Knock out the doctor and you have effectively knocked out the capacity challenge.

Which brings up the licensing question. Texas Rule of Evidence 702 asks whether a witness’s specialized knowledge will help the fact-finder understand the evidence. It does not ask where the witness holds a license. The Austin court said its research at this stage had not turned up any Texas appellate case announcing or applying a rule that a doctor’s testimony about a testator’s sound mind must be excluded because the doctor is not licensed in Texas. That absence does real work. When a trial court excludes expert evidence “in a manner that is arbitrary, unreasonable, and without reference to guiding principles” — including exclusions that lack any legal basis — it has abused its discretion and mandamus may issue. In re Allstate Indemnity Co., 622 S.W.3d 870, 875, 882–84 (Tex. 2021) (orig. proceeding). A Texas-licensure requirement would also hit out-of-state families hardest, since the treating physician who actually knows the testator’s condition is often the one practicing somewhere else.

How the Court Analyzed the Stay Request

On the struck pleading, the court’s reasoning was short and pointed. The trial court struck a February 11 filing based on a docket-control order it did not sign until February 17. Imposing a retroactive docket-control deadline that way has been held elsewhere to be an abuse of discretion for which there is no adequate remedy by appeal. The court cited In re WL & D Ventures, LLC, No. 14-23-00413-CV, 2023 WL 4503851, at *3 (Tex. App.—Houston [14th Dist.] July 13, 2023, orig. proceeding) (mem. op.) (per curiam), and In re Saddles Blazin, LLC, No. 09-19-00302-CV, 2019 WL 5607905, at *4 (Tex. App.—Beaumont Oct. 31, 2019, orig. proceeding) (mem. op.) (per curiam).

Losing the pleading was not a paperwork problem. Without a live pleading supporting their application to probate the 2018 will, Ybarra and Barba would likely be unable at trial to introduce some of the evidence about the 2018 will that they believe shows the 2022 will should not be admitted. Evidence is relevant only if it concerns a fact “of consequence in determining the action.” Tex. R. Evid. 401(b). And as the Corpus Christi–Edinburg court explained in In re Reyna, No. 13-24-00158-CV, 2024 WL 3943451 (Tex. App.—Corpus Christi–Edinburg Aug. 26, 2024, orig. proceeding) (mem. op.), figuring out which facts are of consequence starts with a review of the pleadings. Strip the pleading and you shrink what counts as relevant.

On the equities, the court noted that the harm inquiry merges heavily with the ultimate mandamus question of whether Ybarra and Barba lack an adequate remedy by appeal. Adequacy is measured by balancing the benefits of mandamus review against its detriments. In re State, 355 S.W.3d 611, 614–15 (Tex. 2011) (orig. proceeding). One factor is whether mandamus spares litigants and the public the time and money wasted on proceedings that get reversed later. In the retroactive-deadline and excluded-expert cases the court had already cited, the reviewing courts balanced the harms in favor of relief. The Austin court preliminarily concluded the same was true here.

Lawrence Perez made two arguments against the stay and lost both. He said Ybarra and Barba waited too long. The court measured the delay from the April 14 orders to the May 28 petition — roughly a month and a half — and called that well within delays Texas courts have tolerated. In re American Airlines, Inc., 634 S.W.3d 38, 42–43 (Tex. 2021) (orig. proceeding) (per curiam), allowed an eight-month delay on a discovery order. In re Laibe Corp., 307 S.W.3d 314, 318 (Tex. 2010) (orig. proceeding) (per curiam), allowed two months. The court also pointed out that Ybarra and Barba were not sitting still — they moved for reconsideration on April 20 and the trial court did not rule until May 21. Laches takes more than delay anyway. It takes a detrimental change in position, and nothing showed Lawrence Perez suffered one between the May 21 denial and the May 28 petition.

His second argument was that the administrative stay had already stopped the trial, so the motion was moot. The court rejected that too. Rule 52.10 relief runs until the original proceeding is finally decided, and nothing in the record showed the trial could not be reset for a date while the mandamus proceeding was still pending. The court cited In re Allied Chemical Corp., 227 S.W.3d 652, 655 (Tex. 2007) (orig. proceeding), where a request to stay trials was not moot in part because the record gave no assurance that no trial would be set before mandamus review finished.

Concluding that both the likely merits and the balance of harms favored Ybarra and Barba, the court granted the motion and stayed the final trial on the 2022 will for the duration of the mandamus proceeding. The order issued June 24, 2026, before Justices Triana, Kelly, and Ellis.

The Takeaway

Read Ybarra for what it is. It is a stay order, not a final ruling on the mandamus petition, and the court was careful to frame its conclusions as preliminary. But a court does not stop a trial on a hunch. When an appellate court says it cannot find any Texas case supporting the rule your trial judge just applied, that is a signal worth paying attention to.

The practical lessons are straightforward. A deadline in a docket-control order cannot reach backward and swallow a pleading filed before the order was signed — check the signature date before you concede a filing was late. An out-of-state physician is not disqualified from opining on testamentary capacity just because the license says another state; if a trial court rules otherwise, make it identify the authority. And if a pretrial ruling is going to gut your case at trial, do not assume you can fix it on appeal. Move for reconsideration, then move quickly on mandamus, and ask for a Rule 52.10 stay so the trial does not outrun the review. A month and a half was fine here. Waiting for a verdict you cannot undo is not.

Our El Paso Probate Attorneys provide a full range of probate services to our clients, including helping with will contests involving competing wills and challenges to a testator’s capacity. Affordable rates, fixed fees, and payment plans are available. We provide step-by-step instructions, guidance, checklists, and more for completing the probate process. We have years of combined experience that we can use to support and guide you with probate and estate matters. Call us today for a FREE consultation.

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The content of this website is for informational purposes only and should not be construed as legal advice. The information presented may not apply to your situation and should not be acted upon without consulting a qualified probate attorney. We encourage you to seek the advice of a competent attorney with any legal questions you may have.

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