Ordinary (Not Maximum) Diligence Governs Post-Limitations Service Under Texas Law; Brief Process-Server Delays Usually Create a Fact Issue

Introduction

Larkins v. S.D.P. Manufacturing (5th Cir. June 18, 2026) is a diversity case applying Texas’s “diligent service” doctrine: a plaintiff who files within limitations but serves after limitations can still avoid a limitations bar if the plaintiff exercised diligence in effectuating service.

Parties: Glenn Larkins and Rhonda Larkins (Plaintiffs–Appellants) sued S.D.P. Manufacturing, Incorporated (manufacturer) and multiple related corporate entities associated with leasing the equipment (Defendants–Appellees).

Background: Glenn Larkins was injured when a “small derrick” tipped over during maintenance work on a defective transformer. Plaintiffs filed suit on the last day of the two-year limitations period under Tex. Civ. Prac. & Rem. Code § 16.003, obtained citations the next day, transmitted them to a process server three days later, and completed service about 50 days after filing (with some delay attributable to process-server confusion over similarly named corporate defendants and to Plaintiffs’ counsel’s asserted distractions from separate courthouse-fire-related proceedings).

Key issue: Whether Plaintiffs were insufficiently diligent as a matter of law in serving process such that limitations was not tolled/related back—supporting dismissal/summary judgment on limitations grounds.

Summary of the Opinion

Judge Ho (joined by the panel) reversed the district court’s dismissal/summary judgment. The Fifth Circuit held that the district court demanded more than Texas law requires. Texas requires ordinary diligence, not the “highest degree” of diligence. Drawing reasonable inferences in Plaintiffs’ favor, the record created a genuine fact question on diligence, precluding disposition “as a matter of law.” The case was reversed and remanded.

Analysis

Precedents Cited

1) Core Texas Supreme Court framework on diligent service

• Texas State Univ. v. Tanner, 689 S.W.3d 292 (Tex. 2024)
  The opinion treats Tanner as the central modern statement of the doctrine: limitations requires both filing and timely service, but late service relates back if the plaintiff is diligent. The Fifth Circuit relied heavily on Tanner’s language that diligence is “truly trying to achieve service” and that a delay is fatal only if the plaintiff’s explanation is “patently unreasonable.” It also adopted Tanner’s practical concern that strict rules would create “perverse incentives” where defendants or third parties make service difficult.
• Proulx v. Wells, 235 S.W.3d 213 (Tex. 2007)
  Provided the structure for the fact-intensive inquiry and the rule that the plaintiff must “explain every lapse in effort or period of delay.” The Fifth Circuit used Proulx to frame the burden and to emphasize that elapsed time alone does not prove lack of diligence.
• Ashley v. Hawkins, 293 S.W.3d 175 (Tex. 2009)
  Supplied the “ordinarily prudent person” standard: whether the plaintiff acted as an ordinarily prudent person would under similar circumstances, and remained diligent until service was achieved.

2) Texas intermediate appellate decisions reinforcing “ordinary diligence” and fact issues

• Sharp v. Kroger Texas L.P., 500 S.W.3d 117 (Tex. App.—Hous. [14th Dist.] 2016)
  Cited for the crucial limiting principle: “A plaintiff is not required to use the highest degree of diligence.” This was the Fifth Circuit’s direct answer to the district court’s more exacting expectations.
• Budget Rent A Car System, LLC v. Valadez, 558 S.W.3d 304 (Tex. App.—Hous. [14th Dist.] 2018)
  Used to explain burden shifting: if the plaintiff’s explanation raises a fact issue, the burden shifts back to the defendant to conclusively show insufficiency. The Fifth Circuit distinguished Valadez because there the plaintiff offered no evidence explaining a substantial delay in even transmitting citations.
• Mauricio v. Castro, 287 S.W.3d 476 (Tex. App.—Dallas 2009) and Rojas v. CitiMortgage, Inc., 2017 WL 4054397 (Tex. App.—Corpus Christi Sept. 14, 2017)
  Quoted for the “minimal delay/minimal explanation” concept and for the broader point that short delays do not automatically negate diligence. The Fifth Circuit also noted that dismissals in short-delay cases often turn on the plaintiff’s failure to present any evidence.
• English v. Record, 2021 WL 4095253 (Tex. App.—Hous. [1st Dist.] Sept. 9, 2021) and Fontenot v. Gibson, 2013 WL 2146685 (Tex. App.—Hous. [1st Dist.] May 16, 2013)
  Key comparators: both involved longer and/or more numerous delays than the 50-day period here, yet still produced fact issues on diligence. The Fifth Circuit emphasized English’s recognition that “reliance on a process server may constitute reasonable diligence in some circumstances.”
• Harrell v. Alvarez, 46 S.W.3d 483 (Tex. App.—El Paso 2001) and Boyattia v. Hinojosa, 18 S.W.3d 729 (Tex. App.—Dallas 2000)
  Cited to support the idea that an ordinarily prudent litigant may allow third parties (clerks/process servers) a reasonable time to perform duties, and that brief periods of waiting are not inherently unreasonable.
• Branch Banking and Tr. Co. v. SWIG Partners GP, LLC, 2017 WL 6627541 (Tex. App.—Dallas Dec. 13, 2017)
  Reinforced that allowing a process server reasonable time to accomplish service can be consistent with diligence; plaintiffs are not “strictly liable” for every process-server delay.
• Additional authorities marshaled to show rarity of “as a matter of law” findings on diligence include: Taylor v. Rellas, 69 S.W.3d 621 (Tex. App.—Eastland 2002, no pet.); Rivera v. Henderson, 2022 WL 3722320 (Tex. App.—Hous. [1st Dist.] Aug. 30, 2022); Ray v. O'Neal, 922 S.W.2d 314 (Tex. App.—Fort Worth 1996); Cornejo v. Int'l Bank of Com., 2021 WL 4296416 (Tex. App.—Austin Sept. 22, 2021).

3) Authorities invoked by Defendants/district court and why the Fifth Circuit found them unpersuasive

• Deeds v. Whirlpool Corp., 2017 WL 3437772 (S.D. Tex. Aug. 10, 2017), aff’d 764 Fed. App'x 407 (5th Cir. 2019)
  The Fifth Circuit characterized Deeds narrowly: “being busy with other tasks for other cases” does not excuse tardy service. It distinguished this record as involving prompt transmission to a process server, confusion attributable to multiple similar entities/addresses, and subsequent corrective steps.
• Rodriguez v. Tinsman & Houser, Inc., 13 S.W.3d 47 (Tex. App.—San Antonio 1999) and Perkins v. Groff, 936 S.W.2d 661 (Tex. App.—Dallas 1996)
  Distinguished because they involved a complete lack of explanation or affirmative instruction not to issue citation—i.e., “inactivity or complete failure” rather than imperfect-but-active service efforts.
• Footnote discussion: Flanigan v. Nekkalapu, 613 S.W.3d 361 (Tex. App.—Fort Worth 2020, no pet.)
  Not relied upon by the parties below, but addressed by the court. The panel noted Flanigan’s disapproval of “wholesale reliance” on a process server for “four and a half weeks,” while also noting Flanigan’s acknowledgment that two- or three-week (and even two-month) delays may still be fact-dependent. The opinion treated this as underscoring the case-specific nature of the inquiry rather than establishing a rigid cutoff.

4) Federal procedural and Erie framework (why the Fifth Circuit was deciding this under Texas law)

• GWTP Investments, L.P. v. SES Americom, Inc., 497 F.3d 478 (5th Cir. 2007)
  Provided the de novo standard for review of dismissals and summary judgments.
• Jackson v. Duff, 161 F.4th 343 (5th Cir. 2025) (quoting Ashcroft v. Iqbal, 556 U.S. 662 (2009)) and Jones v. Alcoa, Inc., 339 F.3d 359 (5th Cir. 2003)
  Addressed Rule 12(b)(6) plausibility and that limitations can support dismissal.
• Norman v. Bodum USA, Inc., 44 F.4th 270 (5th Cir. 2022) (quoting Anderson v. Liberty Lobby, Inc., 477 U.S. 242 (1986))
  Confirmed summary judgment standards: whether a reasonable jury could find for the nonmovant.
• Huss v. Gayden, 571 F.3d 442 (5th Cir. 2009) and Erie R.R. Co. v. Tompkins, 304 U.S. 64 (1938)
  Explained that substantive state law governs in diversity.
• Saenz v. Keller Industries of Texas, Inc., 951 F.2d 665 (5th Cir. 1992)
  Supported that statutes of limitations are substantive under Erie and that due diligence is “usually a fact question,” with “rare instances” where courts negate diligence as a matter of law.

Legal Reasoning

1. Texas “diligent service” doctrine controls because limitations is substantive in diversity, so Texas law governs. Filing on the last limitations day is timely, but Plaintiffs still had to show diligence in serving process after limitations.
2. Diligence is measured by ordinary prudence, not perfection. The panel explicitly rejected a “highest degree” approach and recast the district court’s criticisms (three days to transmit citations, 18 business days to follow up, several days to clarify addresses) as potentially consistent with ordinary diligence depending on context.
3. Delay must be explained, but explanations are evaluated for “patent unreasonableness,” not for whether the plaintiff could have acted faster. The court emphasized that minimal delays can be supported by minimal explanations and that some waiting on third parties can be reasonable.
4. This record contained affirmative evidence of ongoing efforts and case-specific complications, including: (a) prompt citation request and near-immediate transmittal to a process server; (b) multiple similarly named corporate entities (creating legitimate service-instruction complexity); (c) process-server confusion (a third-party impediment rather than plaintiff abandonment); (d) an “audit” of entity addresses and revised service instructions; and (e) an asserted contemporaneous disruption (courthouse fire and related proceedings). Even if a factfinder later rejects these explanations, they were sufficient to prevent a finding of non-diligence “as a matter of law.”
5. The opinion preserves the limiting rule that plaintiffs remain responsible for service—they cannot “forget about the case” after hiring a process server. But responsibility does not translate into strict liability for every process-server lag; Texas law permits some reliance and reasonable waiting.

Impact

• Higher bar for limitations-based dispositive motions on diligent-service grounds in Texas-law diversity cases: Defendants seeking dismissal/summary judgment must show the plaintiff’s explanation is not merely weak but “patently unreasonable,” or that there is true abandonment/inactivity comparable to cases with no evidence or affirmative non-service instructions.
• Practical protection for last-day filers: The decision reinforces that filing on the final limitations day is not automatically fatal if service follows with reasonably active efforts. Courts should be wary of converting diligence into an “ideal practice” checklist.
• Process-server reliance recognized (within limits): The ruling will likely be cited to resist bright-line arguments that a plaintiff must follow up within a short, fixed interval. At the same time, the opinion’s caution that plaintiffs cannot “blindly rely” on process servers signals that long, unexplained silence remains risky.
• Fact-intensive framing encourages trials or evidentiary development: By emphasizing that diligence is “usually one of fact,” the opinion may shift disputes toward discovery and credibility determinations rather than early dismissal.

Complex Concepts Simplified

Statute of limitations

A deadline to bring a claim. In Texas personal injury cases, it is commonly two years (here, Tex. Civ. Prac. & Rem. Code § 16.003).

Service of process / citation

The formal delivery of the lawsuit papers to the defendant. In Texas practice, the “citation” is the official notice issued for service.

Diligent service / relation back

Texas allows service after limitations if the plaintiff filed on time and was diligent in attempting service; if diligent, service “relates back” to the filing date for limitations purposes.

Ordinary diligence (ordinarily prudent person)

The practical, common-sense level of effort a reasonable person would use under similar circumstances—not the fastest or most aggressive approach possible.

“Explain every lapse” and “patently unreasonable”

The plaintiff must account for gaps in service efforts, but a court can take the issue away from a jury only when the explanation is plainly unacceptable on its face.

Fact question vs. matter of law

If reasonable people could disagree about diligence based on the evidence, it is for the factfinder (often a jury), not for dismissal or summary judgment.

Rule 12(b)(6) dismissal vs. Rule 56 summary judgment

Dismissal tests whether the complaint plausibly states a claim; summary judgment tests whether evidence shows no genuine dispute of material fact. The panel held the diligence dispute could not be resolved conclusively on this record.

Conclusion

Larkins v. S.D.P. Manufacturing reinforces a practical and defendant-neutral rule under Texas law: post-limitations service does not doom a timely filed suit if the plaintiff exercised ordinary diligence, and courts should not demand the “highest degree” of effort or treat moderate, explained delays—especially where process-server complications exist—as non-diligence “as a matter of law.” The Fifth Circuit’s reversal underscores that diligent-service disputes will ordinarily turn on factfinding unless the plaintiff’s explanation is patently unreasonable or shows true abandonment.