Introduction
A Texas defendant rarely causes the entire harm alone. A subcontractor, another driver, a property owner, or a product maker may have contributed, and if that nonparty never reaches the jury charge, the defendant can carry the entire percentage of responsibility.
A motion for leave to designate a responsible third party (RTP) is the procedural route to put that nonparty before the fact finder. It is a request under Chapter 33 of the Texas Civil Practice and Remedies Code (CPRC), not a finding that anyone is liable.
This guide covers the statutory framework, deadlines, the factual foundation, objections, later motions to strike, and how defense teams can prepare. Verify current statutory text, rules, and scheduling orders before filing.
Key Takeaways
- Defendants generally seek leave under CPRC § 33.004 before designating a nonparty.
- The motion must tie the nonparty's wrongful conduct to the claimed injury.
- Designation alone creates no liability and no judgment against the nonparty.
- Pleading, disclosure, evidence, and liability are four separate inquiries.
- Confirm deadlines against the current scheduling order and local rules.
What Is a Texas Motion for Leave to Designate a Responsible Third Party?
A Texas motion for leave to designate a responsible third party (RTP) lets a defendant place a non-party's fault before the fact finder under Civil Practice and Remedies Code Chapter 33. Designation can reduce the defendant's proportionate share without joining that person as a party.
What is a responsible third party under Texas law?
Section 33.011(6) defines an RTP as any person alleged to have caused or contributed to causing the harm. That includes negligent acts or omissions, defective or unreasonably dangerous products, other conduct that violates an applicable legal standard, or a combination. It excludes a seller eligible for indemnity under § 82.002.
Candidates include contractors, other drivers, property owners, and product-chain entities. Not every category fits every case.
Employers show why. Labor Code § 408.001 makes workers' compensation the exclusive remedy against a covered employer, but that immunity is not a categorical bar to designation.
Galbraith Engineering Consultants v. Pochucha (Tex. 2009) explains that the 2003 amendments allow responsibility to be allocated despite impediments to liability, including statutory immunity. Analyze each proposed RTP on its own facts.
How does designation affect proportionate responsibility?
Under § 33.003, the fact finder assigns whole-number percentages of responsibility to each claimant, defendant, settling person, and designated RTP. Submission requires sufficient evidence to support it.
A percentage is not a damages award. Under § 33.013, a liable defendant ordinarily owes damages equal to its own percentage. Joint and several liability generally applies only when that percentage exceeds 50%, or in the narrow specific-intent scenarios the statute lists.
What does the motion for leave accomplish?
It differs from a third-party petition, joinder, or an amendment adding a defendant. Granting leave designates the person for Chapter 33 purposes (§ 33.004(h)). It does not establish liability, waive defenses, or replace proof.
Section 33.004(i) adds that filing, granting, or a fault finding does not impose liability on the RTP, and cannot do so in another proceeding through preclusion or another theory.
Current case-law standards
Three decisions frame the analysis:
- In re Coppola (Tex. 2017): Trial courts have no discretion to deny a timely motion absent a pleading defect and an opportunity to cure. The Court did not decide whether the allegations were sufficient.
- Gregory v. Chohan (Tex. 2023): Striking a designated RTP was harmful error where expert proof showed oversteering, a truck overturn, and a road obstruction that raised later collision risk.
- K&K Inez Properties v. Kolle (Tex. May 22, 2026): The Court upheld striking a county in a flooding dispute. Proof the county might have contributed was not enough without evidence of a violated legal standard.
Takeaway: Causal involvement alone is insufficient. Identify the legal standard, the alleged breach, and the causal link. K&K Inez does not require the same negligence or expert showing for every RTP category.
When and How Must the Motion Be Filed?
The ordinary pretrial deadline
Under § 33.004(a), the motion must be filed on or before the 60th day before the trial date, unless the court finds good cause for a later filing.
Trial settings move. Check the current docket control order, any continuances, and local rules, then calendar the deadline from the operative trial date. Under TRCP 4, exclude the triggering day and include the last day unless it falls on a weekend or legal holiday.
Service and the 15-day objection period
Serve the motion on all parties. Under § 33.004(f), the court must grant leave unless a party objects on or before the 15th day after service. Under TRCP 21a(c), three days are added when service is by mail. Electronic service carries no extension.
What an objection can challenge
A timely objection can argue insufficient factual pleading about the proposed RTP's responsibility. Under § 33.004(g), leave remains mandatory unless the objector shows the pleading is deficient and the defendant, after a chance to replead, still fails to comply with the pleading rules.
That is a pleading test. The evidence test comes later, under § 33.004(l), through a motion to strike after adequate discovery. Do not conflate the two.
Late designation, disclosure duties, and limitations
A late motion needs good cause. Document facts such as newly discovered evidence or a newly identified contributor.
Section 33.004(d) bars designation after limitations has run on the RTP only if the defendant failed its duty to timely disclose that the person may be designated. Current TRCP 194.2(b)(12) requires disclosure of any person who may be designated as an RTP. Initial disclosures are generally due 30 days after the first answer or general appearance.
Two cases show the line:
- In re Dawson (Tex. 2018): The defendant answered "Defendant will supplement" and never timely identified the person. Designation after limitations was an abuse of discretion.
- In re Mobile Mini (Tex. 2020): Suit was filed 19 days before limitations ran, and the defendant disclosed when its response was due. Section 33.004(d) did not demand earlier disclosure.
Both cases apply former rule numbering. Designation is not a tool to revive an expired claim or dodge disclosure duties.
What Should the Motion Contain and What Evidence Supports It?
Pleading the factual theory of responsibility
Section 33.004(g) points to the Texas pleading standard, and TRCP 47(a) requires fair notice. Include:
- The proposed RTP's correct legal name and available identifying information
- Its relationship to the occurrence
- The specific acts or omissions at issue
- How those facts connect to the claimant's injury or damages
Plead concrete facts. Labels like "negligent" or "at fault" invite an objection. Skip full merits briefing, which the leave stage does not require.
Identifying the applicable legal standard
Name the standard: a duty of reasonable care, a statute, a product-safety standard, or another recognized obligation. Then connect the departure from that standard to the injury, pleading alternative causation theories where the evidence supports them. This is the gap that sank the designation in K&K Inez.
Evidence to gather before filing
Evaluate:
- Pleadings, contracts, and incident reports
- Photographs and inspection materials
- Medical or engineering records
- Communications, deposition testimony, and discovery responses
- Available expert opinions
Presence or involvement is not enough. Organize the proof to show a fact issue on conduct, standard, and causal contribution. The evidence standard mirrors a no-evidence summary judgment: more than a scintilla of probative evidence.
Discovery and expert strategy
Aim discovery at the RTP's role, control, knowledge, contractual duties, the product or premises condition, and causal contribution. Preserve evidence that could be lost or altered.
Experts matter when the issue is beyond common understanding. Mack Trucks v. Tamez required expert proof for alleged defects, and Jelinek v. Casas demands medical-causation opinions that explain why an inference is preferable. These are underlying proof rules, not universal expert requirements for leave. A conclusory expert label will not carry the day.
Requested relief, attachments, and final check
State the relief requested, attach or cite supporting materials as the court permits, and address good cause if filing late. Before filing, confirm:
- Party names match across all filings
- Docket dates are current
- Disclosure history is consistent
- Confidential material is protected
- Local formatting and submission rules are met
What Happens After Leave Is Granted?
Opposition and a later motion to strike
After adequate discovery, a party may move to strike under § 33.004(l). The court must grant the motion unless the defendant produces evidence raising a genuine fact issue on the RTP's responsibility.
Outcomes turn on the proof:
- Gregory: designation survived on expert-backed negligence and causation
- K&K Inez: designation failed for lack of evidence of a standard violation
Effect on trial and liability
If the designation survives, the RTP can appear in the jury charge and the percentage allocation. It does not become a defendant, and no judgment issues against it. Naming it as a defendant requires a separate step, such as an amended pleading. Galbraith distinguishes designation from joinder.
Settlements change the recovery math. Section 33.012 reduces recovery by claimant responsibility and, generally, by settlement dollars, with a special election in Chapter 74 claims.
Ongoing case management
After the ruling, update:
- Case evaluation
- Discovery plan
- Expert strategy
- Settlement analysis
- Proposed jury questions
Keep building proof. Leave is not a substitute for proving responsibility at trial.
Practical Workflow and Technology Considerations
Defense-team checklist from issue spotting through filing
- Identify possible responsible third parties
- Preserve relevant data and ESI
- Review pleadings and disclosures for designation timing
- Confirm limitations periods and docket deadlines
- Conduct targeted discovery on third-party fault
- Evaluate expert needs on causation or allocation
- Draft the factual theory of third-party responsibility
- Serve the motion for leave to designate
- Monitor objections and responses
- Prepare for a possible motion to strike
Keep defense counsel, insurers, claims professionals, and experts aligned so factual assumptions about responsible parties stay consistent across the file.
Using structured claim data to support review
A defense-focused platform such as OraClaim can help teams organize unstructured claim files. It reviews policy, medical, liability, and correspondence records to surface key facts, builds unified timelines, and supports a repeatable review process for designation workups. That is operational support, not legal analysis or automated filing.
Attorneys must validate the facts, apply Texas law, and decide whether and how to file. Confidentiality is part of that duty. Texas Ethics Opinion 705 (February 2025) says lawyers must understand generative AI risks, take reasonable confidentiality precautions, and verify outputs.
Frequently Asked Questions
Do you need leave of court to file a motion to designate a responsible third party?
Generally, yes. The defendant files a motion for leave under CPRC § 33.004, and the court must grant it unless a party timely objects. Check the deadline, objection process, and current orders.
What does filing a motion for leave to designate a responsible third party mean?
The defendant asks permission to identify a nonparty whose conduct the fact finder may consider in apportioning responsibility. It does not ask the court to impose liability on that person.
What is a responsible third party under Texas law?
Under § 33.011(6), it is a person alleged to have caused or contributed to the harm through negligence, a defective product, or other conduct violating an applicable legal standard.
When is the deadline to file a Texas motion for leave to designate a responsible third party?
Generally on or before the 60th day before trial, unless the court finds good cause for a later filing. Confirm against scheduling orders and local rules.
Can the plaintiff object to a responsible third-party designation?
Yes. A party may object within 15 days after service, arguing insufficient pleading. A later motion to strike under § 33.004(l) challenges the evidence after adequate discovery.
Does designating a responsible third party make that person liable for the plaintiff's damages?
No. Designation creates no liability or judgment against the nonparty. If it survives challenges, it may affect the fact finder's allocation of responsibility among the parties.
