What is the litigation takeaway from In re Miranda Fredenberg?

Plenary power expiring does not necessarily end a court’s ability to issue support-enforcement instruments like an income withholding order—especially when the final SAPCR order anticipates withholding and the Family Code authorizes it. If you plan to attack a visiting judge’s post‑judgment authority, you must build a precise record of what was signed and when, and move quickly because an amended assignment can prospectively cure assignment-scope problems.

What is the summary of In re Miranda Fredenberg?

In a SAPCR modification case, the mother sought mandamus/prohibition arguing a retired visiting judge lost authority to act once the trial court’s plenary power expired because the assignment order carried forward only “until plenary power has expired.” After the modification order was signed, the visiting judge signed an income withholding order (IWO) after plenary power expired and scheduled/reset hearings on other post‑judgment motions. The Tyler Court of Appeals applied the mandamus standard (clear abuse of discretion and no adequate appellate remedy) and analyzed (1) the distinction between plenary power over the merits and the court’s continuing enforcement jurisdiction, and (2) the scope of the visiting judge’s assignment. The court held the post‑plenary IWO was not void because it functioned as an enforcement tool contemplated by the modification order and authorized by Texas Family Code § 158.102, which allows withholding to issue until support/arrearages are paid. As to other post‑judgment matters, the record did not show the visiting judge ruled on them outside his authority before the presiding administrative judge issued an amended assignment expressly granting authority to handle post‑judgment proceedings going forward. Mandamus and prohibition were denied.

When does a Texas trial court’s plenary power expire after signing a final judgment if a party files a post-judgment motion?

Under Texas Rule of Civil Procedure 329b, plenary power generally expires 30 days after the judgment is signed, but timely post-judgment motions (such as a motion for new trial or a motion to modify, correct, or reform the judgment) can extend plenary power. If the motion is not determined by a signed written order within 75 days, it is overruled by operation of law, and the court’s plenary power extends until 30 days after that overruling—meaning plenary power can last up to 105 days after the judgment is signed. See TEX. R. CIV. P. 329b(c), (e); L.M. Healthcare, Inc. v. Childs, 929 S.W.2d 442, 444 (Tex. 1996).

Under Texas Rule of Civil Procedure 329b, what happens if a motion to modify, correct, or vacate a judgment is not ruled on within 75 days?

If a timely motion for new trial or a motion to modify, correct, or reform the judgment is not determined by a signed written order within 75 days after the judgment is signed, it is overruled by operation of law. TEX. R. CIV. P. 329b(c). Once overruled (by order or by operation of law), the trial court retains plenary power for 30 additional days to grant a new trial or to vacate, modify, correct, or reform the judgment. TEX. R. CIV. P. 329b(e).

Can mandamus relief be granted in Texas if a trial court signs an order after its plenary power has expired?

Yes. Mandamus is an extraordinary remedy available when the relator shows (1) no adequate remedy by appeal and (2) a clear abuse of discretion. Texas courts recognize mandamus as appropriate when a trial court issues an order after its plenary power has expired, because such an order can be void. See In re Sw. Bell Tel. Co., L.P., 235 S.W.3d 619, 623 (Tex. 2007); In re Brookshire Grocery Co., 250 S.W.3d 66, 68 (Tex. 2008).

Do the terms of a Texas visiting judge assignment order control the visiting judge’s authority and when it ends?

Yes. The assignment order’s terms control both the scope of the visiting judge’s authority and when that authority terminates. Courts look to the assignment’s conditions—such as whether it continues until plenary power expires or until the presiding judge terminates it in writing—to determine the visiting judge’s continuing power to act. See Hull v. S. Coast Catamarans, L.P., 365 S.W.3d 35, 41 (Tex. App.—Houston [1st Dist.] 2011, pet. denied).

What powers does an assigned judge have under Texas Government Code Section 74.059(a)?

Texas Government Code Section 74.059(a) provides that a judge assigned under Chapter 74 has “all the powers of the judge of the court to which he is assigned.” This statutory grant allows an assigned judge, when properly assigned, to hear and decide matters within the court’s jurisdiction, including post-judgment matters if included within the assignment’s scope. See TEX. GOV’T CODE § 74.059(a).

Can a Texas court issue an income withholding order for child support after plenary power over the underlying judgment has expired?

Yes, when the underlying judgment authorizes enforcement through income withholding, the trial court is not necessarily deprived of jurisdiction to sign an income withholding order after plenary power expires. Texas Family Code Section 158.102 also contemplates that an income withholding order or writ “may be issued” until current support, arrearages, interest, and applicable fees and costs are paid. See TEX. FAM. CODE § 158.102; see also Holland v. Holland, 357 S.W.3d 192, 198–99 (Tex. App.—Dallas 2012, no pet.) (upholding post-plenary income withholding where decree provided for that enforcement mechanism).

Does a pending appeal prevent a Texas trial court from exercising plenary power or taking authorized enforcement actions?

Not necessarily. Texas Rule of Civil Procedure 329b(e) states that if a timely motion for new trial is filed, the trial court retains plenary power to vacate, modify, correct, or reform the judgment for the rule’s specified period “regardless of whether an appeal has been perfected.” Additionally, courts may treat certain enforcement steps—such as income withholding authorized by the judgment and the Family Code—as actions the court can take even after plenary power expires. See TEX. R. CIV. P. 329b(e); TEX. FAM. CODE § 158.102.

In re Miranda Fredenberg | Texas Family Law Powerhouse

In re Miranda Fredenberg, 12-26-00044-CV, March 25, 2026.

On appeal from County Court at Law of Rusk County, Texas

Synopsis

The Twelfth Court of Appeals (Tyler) denied mandamus and prohibition challenging a retired visiting judge’s authority to act after plenary power expired in a SAPCR modification case. The court held the post-plenary income withholding order was still permissible as an enforcement mechanism contemplated by the modification order and authorized by Texas Family Code § 158.102, and the visiting judge did not rule on other post-judgment matters until after an amended assignment expressly granted post-judgment authority.

Relevance to Family Law

This opinion is a useful reminder that “plenary power” is not the end of the story in SAPCR practice—especially where support enforcement tools are statutorily authorized and expressly built into the modification order. It also underscores that visiting-judge assignment language matters: litigators should read (and, when necessary, challenge) the scope and termination trigger in the assignment order, but must also anticipate that the presiding administrative judge can cure assignment-scope issues prospectively through an amended assignment that expressly covers post-judgment proceedings.

Case Summary

Fact Summary

The underlying dispute arose from a divorce/SAPCR involving four children. In June 2024, the father (RPI) filed a petition to modify. The presiding judge of the Tenth Administrative Judicial Region assigned a retired judge (Respondent) to the Rusk County Court at Law for two days; the assignment order included a common “carry-forward” clause: if the visiting judge began a trial on the merits during the assignment window, the assignment continued “until plenary power has expired or the undersigned terminates the assignment in writing, whichever occurs first.” On October 2, 2025, the visiting judge signed the SAPCR modification order. The mother (Relator), acting pro se, pursued multiple post-judgment steps: she filed a notice of appeal, requested findings/conclusions, and later filed a motion to vacate or correct the judgment. The visiting judge scheduled and reset hearings on pending motions, and after plenary power had arguably expired, signed an income withholding order (IWO) on January 29, 2026. Relator sought mandamus/prohibition, contending that once plenary power expired (and given the assignment’s “plenary power” termination language), the visiting judge lacked jurisdiction to sign post-judgment orders, and that a later amended assignment could not “revive” an expired assignment. After the mandamus was filed, the presiding administrative judge signed an amended assignment order expressly granting broad authority “from this date forward,” including “any post-judgment matters,” and lasting until terminated in writing.

Issues Decided

Whether the visiting judge’s assignment—tied to expiration of plenary power—deprived him of authority to sign an income withholding order after plenary power expired.
Whether the visiting judge acted outside his authority by proceeding on other post-judgment matters after plenary power expired.
Whether an amended assignment order could supply authority for post-judgment proceedings going forward, and whether mandamus/prohibition should issue to stop future proceedings.

Rules Applied

Mandamus standard: Relator must show (1) no adequate remedy by appeal and (2) a clear abuse of discretion.
In re Sw. Bell Tel. Co., L.P., 235 S.W.3d 619 (Tex. 2007) (orig. proceeding)
In re Cerberus Capital Mgmt., L.P., 164 S.W.3d 379 (Tex. 2005) (orig. proceeding)
Mandamus appropriate for post-plenary orders: Orders signed after plenary power expires may be void and subject to mandamus.
In re Brookshire Grocery Co., 250 S.W.3d 66 (Tex. 2008) (orig. proceeding)
Assignment orders control visiting judge authority: The terms of the assignment order define the extent/termination of power.
Hull v. S. Coast Catamarans, L.P., 365 S.W.3d 35 (Tex. App.—Houston [1st Dist.] 2011, pet. denied)
Plenary power timetable: Texas Rule of Civil Procedure 329b’s 30/75/105-day framework.
TEX. R. CIV. P. 329b(c), (e); L.M. Healthcare, Inc. v. Childs, 929 S.W.2d 442 (Tex. 1996)
Income withholding may issue until support/arrearages are paid:
TEX. FAM. CODE § 158.102
Post-plenary IWO jurisdiction where decree/order contemplates enforcement:
Holland v. Holland, 357 S.W.3d 192 (Tex. App.—Dallas 2012, no pet.)
Assigned judge has full powers of the court to which assigned:
TEX. GOV’T CODE § 74.059(a)

Application

The Tyler court first anchored the timeline. The modification order was signed October 2, 2025. Relator’s motion to vacate/correct extended plenary power under Rule 329b, but only up to the outer limit—105 days after judgment—because the visiting judge never signed an order ruling on that motion; it was therefore overruled by operation of law. That put plenary power expiration at January 15, 2026. Relator’s mandamus theory depended on collapsing all post-judgment activity into a single “void-after-plenary” bucket and further tying the visiting judge’s authority to the assignment’s “until plenary power expires” clause. The court did not accept that framing for the IWO. Instead, it treated the IWO as an enforcement device expressly contemplated by the modification order itself (the order directed that, upon request by specified persons/entities, the clerk would deliver a certified copy of the IWO to an employer) and as independently permitted by Family Code § 158.102, which authorizes issuance of withholding until support-related obligations are satisfied. Relying on Holland, the court reasoned that the visiting judge was not “deprived of jurisdiction” to sign the IWO merely because plenary power over the modification order had expired. On the broader request for extraordinary relief to stop “further proceedings,” the court emphasized what the record did—and did not—show. While the visiting judge reset a hearing during plenary power, the record did not show he actually ruled on post-judgment motions after plenary power expired until after the presiding administrative judge issued an amended assignment granting broad post-judgment authority going forward. With that amended assignment in place, and no demonstrated void ruling on the merits of post-judgment motions before it, Relator could not establish a clear abuse of discretion.

Holding

The court denied mandamus and prohibition because Relator failed to show a clear abuse of discretion. The income withholding order, though signed after plenary power expired, was treated as an authorized enforcement mechanism contemplated by the modification order and permitted by Texas Family Code § 158.102 even post-plenary. The court also declined to prohibit the visiting judge from presiding over future proceedings because the record did not demonstrate he ruled on other post-judgment matters outside his authority; any meaningful post-judgment action occurred only after the presiding administrative judge issued an amended assignment expressly conferring post-judgment authority.

Practical Application

For family law litigators, the strategic lesson is to separate (1) the court’s continuing enforcement jurisdiction and statutory enforcement tools from (2) plenary power over merits modifications—and then overlay (3) the visiting judge’s assignment language on top of both.

Do not assume “plenary power expired” automatically voids every post-judgment support enforcement act. If the modification order contemplates income withholding and the Family Code authorizes issuance “until paid,” an IWO may be treated as enforcement rather than an impermissible merits change—even if signed after plenary power.
If you intend to challenge a visiting judge’s post-judgment authority, build a record of the specific ruling(s) and timing. Tyler’s denial turned in part on the relator’s failure to identify post-judgment orders (other than the IWO) actually signed outside authority and before the amended assignment.
Expect assignment defects to be cured prospectively. The amended assignment here was broad and forward-looking. If your strategy depends on a termination clause (“until plenary power expires”), move quickly; once the presiding judge issues a superseding assignment, the leverage shifts from jurisdiction to discretionary/error preservation arguments.
Drafting matters in final SAPCR orders. If you want post-judgment enforcement to be streamlined, include clear language anticipating withholding and other enforcement steps. Conversely, if you represent the obligor and foresee disputes about the mechanics, consider clarifying the triggering conditions and the precise relief authorized without further court action.

Checklists

Vet Visiting-Judge Authority Early (Assignment Order Audit)

Obtain the signed assignment order(s) immediately (original and any amendments).
Calendar the assignment’s termination trigger (date range, “until plenary power expires,” or “until terminated in writing”).
Confirm whether the visiting judge “began trial on the merits” during the assignment window (common carry-forward condition).
If the assignment is limited, consider requesting clarification or a new assignment before disputed post-judgment hearings.
Preserve objections on the record with the assignment language attached/exhibited where possible.

Plenary Power and Post-Judgment Calendar Control (Rule 329b Discipline)

Docket: judgment signing date + 30/75/105-day dates under TEX. R. CIV. P. 329b.
Confirm which post-judgment filings extend plenary power (MNT, modify/correct/reform, etc.).
Track whether the court signs a written order ruling on post-judgment motions within the required timeframe.
If you seek mandamus based on a void post-plenary order, compile a clean timeline and certified copies of the relevant filings and orders.

Income Withholding Strategy in SAPCR Modifications

Ensure the final modification order clearly authorizes income withholding as an enforcement mechanism (or clearly limits it, if that is the goal).
If challenging a post-plenary IWO, analyze whether it is truly “new relief” or merely enforcement contemplated by the order and authorized by statute.
Cite TEX. FAM. CODE § 158.102 when seeking an IWO post-judgment; be prepared to frame it as enforcement, not modification.
If opposing, focus on whether the IWO exceeds the support actually ordered or conflicts with the terms of the modification order.

Building a Mandamus/Prohibition Record That Survives

Identify each complained-of post-judgment act with date, signed order, and relief granted.
Show why the act is not mere enforcement (i.e., why it changes substantive rights).
Demonstrate why appeal is inadequate for that specific act (not just generally).
Anticipate a curative amended assignment; file promptly and request temporary relief if necessary.

Citation

In re Miranda Fredenberg, No. 12-26-00044-CV, 2026 WL ___ (Tex. App.—Tyler Mar. 25, 2026) (mem. op.).

Full Opinion

Read the full opinion here ~~df153c9e-51d1-41b6-b6eb-b62b8a2c34e5~~

In re Miranda Fredenberg

Litigation Takeaway