When the Other Side Won’t Do Discovery: Deemed Admissions, Rule 26(d)(4), and Summary Judgment in Utah

Some lawsuits are filed for leverage rather than to be tried. The complaint is long—a dozen or more causes of action—and heavy on adjectives, but light on specifics: no identified statement, no date, no witness, no damages methodology. The plaintiff serves bare-bones initial disclosures, then ignores the defendant’s interrogatories, document requests, and requests for admission, betting that the cost of litigating will produce a settlement before anyone has to prove anything.

Utah’s Rules of Civil Procedure are built to defeat that strategy. Used together, Rules 36, 26, and 56 can convert a plaintiff’s refusal to participate in discovery into summary judgment—without requiring the defendant to disprove allegations the plaintiff never substantiated.

1. Requests for admission: silence is an answer

Under Utah R. Civ. P. 36, a request for admission is deemed admitted unless a written answer or objection is served within 28 days. The rule is self-executing. Once admitted, the matter is conclusively established under Rule 36(d) unless the court permits withdrawal on motion.

Utah courts enforce the rule strictly. The Utah Supreme Court has described the consequence of ignoring requests for admission as intentionally harsh and has held that a trial court lacks discretion to unilaterally disregard deemed admissions (Langeland v. Monarch Motors, Inc.; Jensen v. Pioneer Dodge Center, Inc.). To withdraw an admission, the party must show that the admitted matter is relevant to the merits and must come forward with evidence of specific facts showing that it is untrue (Barnes v. Clarkson, quoting Langeland). Admissions that are never challenged are conclusively established (Discover Bank v. Kendall).

2. No interrogatory answers, no document production, no genuine dispute

A plaintiff who refuses to answer interrogatories asking for the factual basis of each claim—every allegedly false statement, every act of interference, every item of damage—has not identified that basis anywhere in the record. At summary judgment, the non-moving party must support a claimed factual dispute by citing particular parts of the record (Utah R. Civ. P. 56(c)(1)(A)), and facts in the moving party’s statement that are not properly disputed are deemed admitted for purposes of the motion (Rule 56(a)(4)). Pleadings alone do not suffice.

The standard favors a well-prepared defendant. In Salo v. Tyler, the Utah Supreme Court adopted the Celotex framework: where the plaintiff will bear the burden of persuasion at trial, the defendant can carry its summary-judgment burden by showing that the plaintiff has no evidence to support an essential element, without producing affirmative evidence of its own.

3. Initial disclosures and the Rule 26(d)(4) bar

Rule 26(a)(1) requires each party, without awaiting a request, to disclose its fact witnesses with a summary of expected testimony, copies of the documents it may offer in its case-in-chief, a computation of each category of damages with the documents on which it is based, insurance agreements, and the documents referenced in its pleadings. Disclosures that consist of boilerplate witness descriptions (“interactions and communications” and “other related matters”), catch-all document categories (“any document disclosed by any party”), and bare damages figures with no methodology do not satisfy the rule.

Rule 26(d)(4) supplies the consequence: a party that fails to disclose or timely supplement may not use the undisclosed witness, document, or material at any hearing or trial unless the failure is harmless or the party shows good cause. Utah appellate courts have described exclusion as mandatory absent harmlessness or good cause (Bodell Construction Co. v. Robbins; Sleepy Holdings LLC v. Mountain West Title) and have enforced it strictly, including by reversing the admission of untimely disclosed witnesses and evidence (Johansen v. Johansen). Supplementation obligations extend to damages disclosures (Butler v. Mediaport Entertainment Inc.), and the burden to show harmlessness or good cause falls on the party that failed to disclose (Keystone Insurance Agency, LLC v. Inside Insurance, LLC).

The bar applies at summary judgment. In Baumann v. Kroger Co., the Court of Appeals affirmed a ruling that a party was precluded by Rule 26(d)(4) from using undisclosed witnesses, documents, or material to contest summary judgment. A plaintiff that never disclosed a records custodian, treating provider, expert, or damages computation cannot introduce one for the first time in an opposition affidavit.

4. Al-Imari and the limits of discretion

In Al-Imari v. Utah Department of Transportation, 2026 UT App 15, the Court of Appeals confirmed that Rule 26(d)(4) has a mandatory component—a party that cannot show good cause or harmlessness will ordinarily not be allowed to use the undisclosed material—while holding that the rule does not require full exclusion in every case and that district courts have discretion to impose lesser measures. The violation in Al-Imari was relatively minor: the opposing parties already possessed all of the information the expert-designation rules required. The court distinguished cases involving a complete failure to disclose.

The practical lesson for defendants is to build the record that places a case on the serious side of that line: document each deficiency in the disclosures, request supplementation in writing, and show that the withheld information is the substance of the plaintiff’s own claims—something no lesser measure can cure. The Utah Supreme Court granted certiorari in Al-Imari on June 11, 2026, so the governing standard may be refined.

5. Damages: the fact of damage still has to be proved

Even where liability is contested on the merits, a plaintiff must prove the fact of damage with evidence giving rise to a reasonable probability that it suffered damage as a result of the defendant’s conduct (Atkin Wright & Miles v. Mountain States Telephone & Telegraph Co.). Round-number estimates, unexplained income tables, unsigned billing statements, and screenshots of retail listings do not supply a computation. Third-party business records offered without a records-custodian certification or qualified witness raise admissibility problems under Utah R. Evid. 803(6) and 902(11), and Rule 56(c)(2) permits an objection that material cannot be presented in an admissible form.

6. The combined effect: procedural lockout

Each rule is independently significant. Together they can be dispositive: deemed admissions conclusively establish facts that defeat elements; unanswered interrogatories leave no identified factual basis for the remaining elements; and Rule 26(d)(4) prevents the plaintiff from filling the gap at the summary-judgment stage with anything it failed to disclose. Merits arguments—lack of a specific defamatory statement, privilege, failure of proximate cause, economic loss rule—then serve as alternative grounds rather than the only line of defense.