Ohio Supreme Court: Civ.R. 9(B) Requires Element-Level Particularity to Plead “Manifest Mistake” to Set Aside a Binding Insurance Appraisal; “Hidden Damages” Allegation Alone Is Insufficient

1. Introduction

In One Church v. Bhd. Mut. Ins. Co., Slip Opinion No. 2026-Ohio-2764 (July 23, 2026), the Supreme Court of Ohio addressed the pleading standard for an insured attempting to avoid the finality of a binding appraisal under a property insurance policy. After a 2019 windstorm loss, One Church and Brotherhood Mutual Insurance Company disagreed on the amount of loss and invoked the policy’s appraisal process. The appraisers agreed to a loss amount, Brotherhood paid it (less deductible), and One Church later alleged that “additional hidden damages were discovered.” Brotherhood refused to pay more, and One Church sued.

The key issues were procedural and doctrinal: (i) what it takes to overcome the binding nature of an appraisal award (fraud or “manifest mistake”), and (ii) how specifically “mistake” must be pleaded under Civ.R. 9(B) to survive a Civ.R. 12(C) motion for judgment on the pleadings.

2. Summary of the Opinion

The Supreme Court reversed the Tenth District and reinstated the trial court’s dismissal on the pleadings. The court held:

  • A binding appraisal is “binding” in the strong sense—courts will not disturb the award absent fraud or a manifest mistake that is “something more than error of judgment,” such as “corruption” or “gross mistake.”
  • Because Civ.R. 9(B) requires mistake to be pleaded “with particularity,” the complaint must allege facts that constitute the elements of manifest mistake.
  • A bare allegation that “additional hidden damages were discovered” after the appraisal does not plead manifest mistake with the required specificity and does not state a claim that could justify setting aside (or effectively augmenting) a binding appraisal award.

The dissent would have treated the case as a contract-interpretation dispute about the scope of what the appraisal covered (known/discoverable damage at the time), rather than a challenge to the appraisal itself, and would have allowed the complaint to proceed.

3. Analysis

3.1. Precedents Cited

The opinion is built on two lines of authority: (1) the finality of appraisal awards, and (2) pleading particularity under Civ.R. 9(B).

A. Finality of appraisal awards and the narrow grounds to set them aside

  • Baltimore & Ohio RR. Co. v. Stankard, 56 Ohio St. 224, 232 (1897): The court cited Stankard for the foundational proposition that appraisal awards are ordinarily binding and “conclusive between the parties,” supplying the default rule of finality that frames the entire dispute.
  • Pfleger v. Renner, 13 Ohio App. 96, 103-104 (1st Dist. 1920): The majority used Pfleger to articulate the heightened threshold for judicial interference: an appraisal award may be disturbed only for defects that are more than “a mere error of judgment,” i.e., “corruption” or “gross mistake.”
  • Burchell v. Marsh, 58 U.S. 344, 350 (1854), quoting Knox v. Symmonds, 1 Ves. Jr. 369: These authorities were invoked (via Pfleger) to emphasize the historic common-law reluctance to re-litigate valuation determinations made by neutral decisionmakers absent extreme defect.
  • Lakewood Mfg. Co. v. Home Ins. Co. of New York, 422 F.2d 796, 798 (6th Cir. 1970), citing Pfleger; and Bates v. Pennsylvania RR. Co., 26 Ohio Law Abs. 114 (2d Dist. 1937): These cases supplied a functional test for “manifest mistake”: the mistake must be of such character that the appraiser “would have corrected it had it been called to his attention.” The majority used this to define what facts must be alleged to plead a qualifying mistake.

B. Pleading standards: Civ.R. 12(C) and Civ.R. 9(B)

  • State ex rel. Johnston v. N. Olmsted City School Dist. Bd. of Edn., 2025-Ohio-1233, ¶ 11: Cited for the standard of review—Civ.R. 12(C) rulings are reviewed de novo.
  • Haddon View Invest. Co. v. Coopers & Lybrand, 70 Ohio St. 2d 154, 159 (1982): Used to explain Civ.R. 9(B)’s function: particularity is met when the defendant is “sufficiently apprised of the specific claims to be required to answer.”
  • Volbers-Klarich v. Middletown Mgt., Inc., 2010-Ohio-2057, ¶ 27, 30: Provided the methodological template: evaluate the complaint’s factual allegations alongside the elements of the claim to determine whether Civ.R. 9(B) is satisfied.
  • In dissent, the court referenced Civ.R. 12(C) sufficiency cases—State ex rel. Ware v. Booth, 2024-Ohio-2102, ¶ 5; Rayess v. Educational Comm. for Foreign Med. Graduates, 2012-Ohio-5676, ¶ 18; and State ex rel. Midwest Pride IV, Inc. v. Pontious, 1996-Ohio-459, ¶ 21—to reinforce that judgment on the pleadings tests the complaint’s adequacy, not the proof.

3.2. Legal Reasoning

  1. Step 1: Identify what One Church is actually trying to do. The majority treated One Church’s suit as an attempt to “augment the appraisal” rather than a truly “new claim.” It relied heavily on One Church’s own litigation statements rejecting the idea of a new claim and characterizing the dispute as Brotherhood’s “refusal to reopen the appraisal process” and the appraisal’s not being a “final determination.” Once framed as a challenge to the appraisal’s finality, the narrow “fraud or manifest mistake” gateway controlled.
  2. Step 2: Apply the binding appraisal rule. Relying on Baltimore & Ohio RR. Co. v. Stankard and Pfleger v. Renner, the court reaffirmed that appraisal is meant to settle the amount of loss conclusively, and judicial review is extremely limited.
  3. Step 3: Convert Civ.R. 9(B) into an element-based pleading test for “mistake.” The decision’s key doctrinal move is equating “pleading with particularity” for mistake with alleging facts that satisfy the elements of manifest mistake. Borrowing the approach from fraud pleading (Haddon View, Volbers-Klarich), the court held: to plead mistake under Civ.R. 9(B), a complaint must contain concrete, element-satisfying facts that put the defendant on notice of the exact nature of the alleged defect in the appraisal.
  4. Step 4: Measure the complaint against the manifest mistake standard. Using Lakewood Mfg. Co. v. Home Ins. Co. of New York (mistake the appraiser would have corrected if alerted), the court concluded the complaint was deficient because it alleged only that “additional hidden damages were discovered,” without the “who/what/where/how/why” necessary to show a gross, appraisal-undermining error: it did not identify who discovered the damages, how they were found, where they were located, why they were previously hidden, or why the omission was a manifest (i.e., correctable and palpable) mistake rather than later-found conditions or a different valuation judgment. The court also noted that One Church did not even use the word “mistake,” reinforcing that the pleading did not squarely invoke the narrow exception to appraisal finality.

3.3. Impact

The decision is likely to reshape how Ohio litigants plead—and defend—post-appraisal disputes.

  • Heightened pleading discipline in appraisal challenges. Plaintiffs can no longer rely on generalized allegations that an appraisal “missed” damage. If the relief sought effectively alters the binding appraisal amount, they must plead manifest mistake with granular facts sufficient to map onto the manifest-mistake standard.
  • Strategic reframing toward “new claims” vs. “reopening appraisal.” The majority’s outcome turns significantly on characterizing the dispute as a challenge to the appraisal. Future insureds who believe later-discovered damage is genuinely outside the original appraisal will likely plead more carefully: (i) expressly treat the later-discovered damage as a separate claim submission under the policy, (ii) avoid asking to “reopen” the prior appraisal, and (iii) plead policy provisions governing supplemental claims, notice, investigation, and limitations.
  • Greater finality and predictability for insurers (and appraisal as an endgame). Insurers will cite One Church to argue that appraisal is not merely a waypoint in claim adjustment but a conclusive valuation mechanism that courts will protect absent tightly pleaded, extreme defects.
  • Procedural leverage at the pleadings stage. By linking Civ.R. 9(B) to element-level pleading for manifest mistake, the court expands insurers’ ability to dispose of appraisal disputes via Civ.R. 12(C) when the complaint lacks detail—even before discovery.
  • Open question highlighted by the dissent: scope of appraisal vs. scope of policy coverage. The dissent framed the issue as “binding as to what property damage?”—arguing the appraisal covered only known/discoverable damage at the time. The majority did not resolve, as a substantive insurance-coverage rule, how appraisal clauses interact with latent/undiscoverable damage; it resolved the case on pleading and characterization. That leaves room for future litigation where a complaint is drafted to squarely present a contract-interpretation theory independent of “mistake.”

4. Complex Concepts Simplified

  • Binding appraisal (insurance). A contractual process where each side selects an appraiser to determine the amount of loss. If the appraisers agree, their number is typically final and cannot be relitigated like an ordinary dispute.
  • Manifest mistake (in appraisal/arbitration-like settings). Not just “they got it wrong.” It is an obvious, significant error that undermines the appraisal’s integrity—something the appraiser would have corrected if alerted (e.g., a clear mathematical error, valuing the wrong property, or another palpable defect), as opposed to a debatable judgment call.
  • Civ.R. 9(B) particularity. For “fraud or mistake,” the complaint must be more detailed than ordinary notice pleading. In this case, the court equated “particularity” with alleging facts that satisfy each element of manifest mistake, not merely stating a conclusion like “mistake occurred.”
  • Civ.R. 12(C) judgment on the pleadings. A mechanism to dismiss (or win) based solely on the pleadings (complaint, answer, and attached documents). No evidence is weighed; the question is whether the complaint states a legally sufficient claim.

5. Conclusion

One Church v. Bhd. Mut. Ins. Co. strengthens Ohio’s commitment to the finality of binding insurance appraisals and announces a clear pleading rule: when an insured seeks relief that would disturb or enlarge a binding appraisal award, Civ.R. 9(B) requires element-level, fact-specific allegations of “manifest mistake”. A generalized assertion that “additional hidden damages were discovered” after the award is not enough.

Practically, the case signals that post-appraisal recovery efforts will rise or fall on (i) how the claim is characterized (supplemental claim vs. appraisal challenge) and (ii) whether the complaint pleads concrete, appraiser-correctable error—rather than incompleteness—at the outset.