When Fraud Unravels an Arbitration Award: A $48 Million Lesson Under the FAA
An arbitrator spends seven years overseeing a contentious commercial dispute. Discovery is extensive. Witnesses testify. Thousands of documents are reviewed. After considering the evidence, the arbitrator issues a detailed award exceeding $48 million.
Then, after the arbitration concludes, new documents emerge showing that a central part of the winning party's story was false.
What happens to the award?
In OptumRx PBM of Illinois, Inc. v. United Networks of America, Inc., No. 3:23-cv-1308-TJC-PDB (M.D. Fla. Oct. 2, 2026), the United States District Court for the Middle District of Florida confronted precisely that situation.
The court concluded that the winning party had concealed documents and presented false testimony during the arbitration. Applying the Federal Arbitration Act (FAA), it vacated the entire $48.36 million award and declined to order a rehearing.
The decision illustrates both the importance of honesty in arbitration and the limits of arbitration's celebrated finality.
Seven Years of Arbitration—and a $48 Million Award
The underlying dispute concerned commissions on prescription drug discount programs.
United Networks of America (UNA) had entered into a 2013 agreement with a pharmacy benefits management business known as Catamaran, whose interests were represented by OptumRx. The agreement provided favorable payment rates for claims associated with UNA's business, including certain subsequently acquired programs.
Shortly after signing the agreement, UNA announced that it had acquired the prescription drug business of National Benefit Builders, Inc. (NBBI), another discount card provider.
The claimed acquisition was significant because it potentially entitled UNA to substantially higher commissions on NBBI's prescription claims.
Catamaran questioned whether the acquisition had actually occurred and eventually terminated the agreement. A lengthy arbitration followed.
One of the central issues was whether UNA had genuinely acquired NBBI's business and, if so, when.
The arbitrator recognized substantial uncertainty surrounding the acquisition documents. In fact, he expressly observed that if UNA had deliberately backdated the purchase agreement, it would constitute fraud.
Nevertheless, after considering other evidence of ownership and control, the arbitrator determined that UNA had acquired the NBBI business by January 2015 and awarded approximately $31 million for outstanding claims.
Together with two other claims, the total award reached $48,362,033.
But the story was not over.
The Evidence That Changed Everything
Following the arbitration, separate federal litigation in Colorado produced documents that had not been disclosed during the arbitration.
Those documents painted a substantially different picture of UNA's dealings with NBBI.
Among other things, the newly discovered evidence included:
An email in which UNA's principal described the purported acquisition announcement as his proposed "story" to Catamaran.
Communications suggesting UNA and NBBI were still negotiating the terms of their relationship after the supposed acquisition date.
Draft agreements indicating NBBI retained ownership of its prescription claims.
Communications in which NBBI representatives denied having an acquisition agreement with UNA.
Evidence contradicting testimony about communications between the companies and the circumstances surrounding the purported purchase agreement.
These were not simply documents that supported a different interpretation of the business transaction.
They directly challenged representations that UNA had made during the arbitration about when the acquisition occurred, whether it occurred at all, and whether relevant documents existed.
The district court found clear and convincing evidence that UNA had misrepresented its acquisition of NBBI's business, withheld documents, and provided false testimony.
The question then became whether that misconduct justified vacating an arbitration award under the FAA.
The FAA Expressly Permits Vacatur for Fraud
Section 10(a)(1) of the FAA provides that a federal court may vacate an arbitration award when:
"the award was procured by corruption, fraud, or undue means"
That language is important.
The FAA strongly favors the finality of arbitration awards. Courts generally cannot vacate an award merely because an arbitrator misunderstood the evidence, misapplied the law, or reached an incorrect conclusion.
But fraud undermines something more fundamental than the correctness of the decision. It potentially undermines the integrity of the process through which the decision was reached.
Still, proving that someone lied during an arbitration does not automatically establish grounds for vacatur.
The Eleventh Circuit established a demanding three-part test in Bonar v. Dean Witter Reynolds, Inc., 835 F.2d 1378 (11th Cir. 1988).
A party seeking vacatur under § 10(a)(1) must establish:
Clear and convincing evidence of fraud. Suspicion, conflicting testimony, or allegations of dishonesty are insufficient.
The fraud could not have been discovered through reasonable diligence before or during the arbitration. A party generally cannot save an otherwise discoverable fraud claim for a post-award challenge.
The fraud materially related to an issue in the arbitration. The misconduct must have a meaningful connection to the dispute rather than concern an incidental matter.
The court applied each requirement in OptumRx.
Fraud Must Be Proven, Not Merely Suspected
During the arbitration, Catamaran strongly suspected that UNA's acquisition documents were backdated.
The arbitrator was aware of those suspicions. Indeed, he acknowledged that backdating, if established, would constitute fraud.
That fact makes the subsequent decision especially interesting.
The district court was not merely revisiting an allegation the arbitrator had already considered and rejected. It was examining substantial evidence that had been concealed from the arbitrator.
The court compared the evidence available during the arbitration with the documents subsequently uncovered in Colorado. That comparison revealed contradictions between UNA's representations and its contemporaneous communications.
The court concluded that the evidence established fraud under the demanding clear-and-convincing standard.
The distinction is critical: A losing party's belief that a witness lied is not the same as subsequently discovering persuasive evidence that the arbitration itself was procured through deception.
The FAA does not permit courts to reconsider witness credibility simply because the losing party disagrees with the arbitrator's assessment. But it does provide a remedy when fraud satisfying § 10(a)(1) is established.
How Much Diligence Is Enough?
Perhaps the most practically significant aspect of OptumRx concerns the second requirement: due diligence.
UNA argued that Catamaran could have uncovered the disputed documents during the arbitration if it had pursued additional discovery.
Catamaran had requested documents, moved to compel production, and subpoenaed NBBI. But it had not exhausted every potential means of obtaining the information, including a separate judicial proceeding to enforce the subpoena before the final hearing.
Was that failure fatal to its motion to vacate?
The court said no.
Importantly, Catamaran had suspected fraud throughout the arbitration. UNA argued that those suspicions, coupled with Catamaran's opportunity to investigate, should preclude vacatur.
The court distinguished O.R. Securities, Inc. v. Professional Planning Associates, Inc., 857 F.2d 742 (11th Cir. 1988), where allegedly false testimony was discoverable through ordinary observation and cross-examination during arbitration.
Here, Catamaran had reason to suspect wrongdoing but lacked access to the very documents that would establish it. The distinction between suspecting fraud and possessing sufficient evidence to prove it was central to the court's analysis.
The court also addressed a particularly consequential discovery decision. The arbitrator had offered Catamaran an opportunity to postpone the final hearing while it pursued a separate lawsuit to enforce its third-party subpoena against NBBI. Catamaran did not take that step. UNA argued that this omission defeated the due diligence requirement.
Relying in part on France v. Bernstein, 43 F.4th 367 (3d Cir. 2022), the court rejected that position.
Catamaran had repeatedly requested the relevant documents, moved to compel production, subpoenaed NBBI, and sought additional discovery and sanctions. Those efforts satisfied the applicable standard.
The court recognized that reasonable diligence does not necessarily require initiating separate federal litigation to enforce third-party subpoenas or pursuing every conceivable discovery mechanism.
It was particularly critical of UNA's position that Catamaran should have done more to uncover documents that UNA itself had been obligated to produce.
This distinction is important because arbitration discovery is ordinarily narrower and less formal than litigation discovery. Parties may rely on representations that responsive documents have been produced, particularly after an arbitrator has addressed discovery disputes.
A party that deliberately conceals responsive evidence cannot necessarily defeat a subsequent fraud challenge by arguing that its opponent should have investigated more aggressively.
At the same time, OptumRx does not excuse a party that ignores readily available evidence or fails to investigate apparent contradictions. Nor does it eliminate the requirement that the fraud could not have been discovered through reasonable diligence.
Rather, the court recognized that a party's reasonable reliance on discovery representations cannot automatically be converted into a failure of diligence when those representations themselves were fraudulent.
The lesson is not that diligence is unnecessary. It is that reasonable diligence is not the same as perfect diligence.
Materiality Does Not Require Proof That the Outcome Would Have Changed
The third requirement also deserves attention.
UNA argued that the newly discovered evidence was immaterial because the arbitrator had relied on other evidence to determine that UNA acquired NBBI's business.
The district court rejected that argument.
The concealed evidence concerned what the arbitrator had described as the central question in the dispute: when did UNA acquire NBBI?
Under Bonar, the party seeking vacatur does not have to prove that the award necessarily would have been different absent the fraud.
Instead, the fraud must materially relate to an issue in the arbitration.
That difference matters.
Requiring a party to establish exactly how an arbitrator would have decided a case with a different evidentiary record would often be impossible. The arbitrator never considered that record, and the court's role is not to conduct the arbitration again.
Here, the concealed evidence directly concerned the legitimacy and timing of the acquisition upon which a substantial portion of the claim depended.
The materiality requirement was satisfied.
Why Did the Court Vacate the Entire Award?
An especially consequential aspect of OptumRx was the remedy.
Of the approximately $48 million awarded, roughly $31 million concerned the disputed NBBI claims. The remaining $17 million related to other contractual obligations, including an early renewal credit, late fees, and dispensing fee restrictions.
Why not vacate only the $31 million component?
The district court considered that possibility but rejected it.
The court concluded that the fraudulent conduct was not confined to one isolated calculation or issue. The deception had continued throughout the arbitration, affected the presentation of evidence, and undermined the credibility of the winning party.
In the court's view, fraud had infected the entire proceeding.
Consequently, attempting to separate the award into fraudulent and unaffected components would be inappropriate.
The court also declined to order a rehearing under § 10(b) of the FAA, reasoning that the extensive history of the dispute, the costs of starting over, and the nature of the misconduct made that remedy unsuitable.
This aspect of the decision is particularly significant. Section 10(a)(1) permits vacatur; it does not automatically mandate vacating every component of an award whenever fraud is established.
The scope of relief requires a separate analysis.
In OptumRx, the district court determined that the pervasive nature of the misconduct justified vacating everything.
What Arbitrators and Litigators Should Take Away
OptumRx provides several practical lessons that extend well beyond the particular commercial dispute.
Fraud allegations require careful attention. Arbitrators need not accept accusations of dishonesty at face value, but credible allegations involving fabricated documents, false testimony, or concealed evidence deserve meaningful consideration.
Discovery representations matter. A party's assurance that no additional responsive documents exist can become important evidence if those documents later surface.
Create a clear record. Counsel who suspect concealment should make appropriate discovery requests, seek relief when necessary, and preserve objections. Those efforts may become essential to establishing due diligence.
Distinguish suspected fraud from newly established fraud. The mere fact that an arbitrator previously considered a fraud allegation does not necessarily foreclose vacatur if material evidence was deliberately withheld.
Consider the integrity of the entire proceeding. Fraud affecting a central issue can have consequences beyond the particular claim to which the concealed evidence directly relates.
For arbitrators, the case also underscores the importance of managing discovery disputes involving allegations that relevant documents have been withheld. Arbitration's efficiency depends in part on the parties' compliance with discovery obligations and their truthful participation in the process.
For litigators, the decision offers both a warning and an opportunity. The FAA's fraud exception is narrow, but it is meaningful. When genuine misconduct is established through newly discovered evidence, even a substantial and carefully reasoned award may not survive judicial review.
Finality Depends on the Integrity of the Process
The FAA's limited grounds for vacatur reflect a deliberate choice to respect arbitration agreements and preserve the finality of arbitral decisions.
But finality is not a license to obtain an award through fraud.
OptumRx illustrates the distinction between an arbitration that produces an arguably incorrect result and one in which material evidence was deliberately concealed or misrepresented.
The former is ordinarily protected by arbitration finality. The latter may warrant judicial intervention under § 10(a)(1).
In vacating the $48.36 million award, the district court did not simply substitute its judgment for the arbitrator's. It concluded that the arbitrator had been denied material information necessary to resolve the dispute on an honest evidentiary record.
Arbitration depends on finality, but finality depends on a process in which the parties can meaningfully present their cases. When fraud undermines that process, the FAA provides a remedy—even when the award is worth $48 million.
NOTE: This decision was appealed the 11th Circuit Court of Appeals.