Vacating an Arbitration Award: Grounds, Deadline, and Procedure

Vacating an arbitration award is possible only in the narrow circumstances Congress wrote into the Federal Arbitration Act. A federal district court must confirm an award unless the party challenging it proves one of four statutory grounds: corruption or fraud in obtaining the award, evident partiality or corruption of the arbitrator, arbitrator misconduct during the hearing, or the arbitrator exceeding their powers. The motion goes to the district where the award was made, and it must be served within three months of the award being filed or delivered. Disagreeing with the outcome is not a ground. Thinking the arbitrator weighed the evidence wrong is not a ground. This is one of the hardest motions to win in civil practice.

The Four Statutory Grounds

Section 10 of the FAA lists the only recognized bases for vacatur, and the Supreme Court confirmed their exclusivity in Hall Street Associates v. Mattel (2008). A court cannot set aside an award because it disagrees with the arbitrator’s reasoning or thinks the result was wrong on the facts.

Corruption, Fraud, or Undue Means

An award obtained through dishonest conduct can be set aside. This covers bribery of the arbitrator, fabricated evidence, or concealment of critical documents that would have changed the outcome. The fraud has to have actually influenced the result, not merely existed somewhere in the background of the case.¹

Evident Partiality or Corruption of the Arbitrator

This ground targets the arbitrator’s bias rather than the parties’ behavior. The common fact pattern is an arbitrator who failed to disclose a financial relationship or personal connection with one side. Courts look for conflicts significant enough that a reasonable person would doubt the arbitrator’s impartiality. A trivial or attenuated connection typically won’t meet the threshold. An undisclosed business relationship with a party almost certainly will.¹

Arbitrator Misconduct During the Hearing

An arbitrator who refuses to postpone a hearing despite legitimate cause, or who blocks a party from presenting key evidence, has committed the kind of misconduct that supports vacatur. The question is whether the arbitrator’s conduct denied someone a fundamentally fair proceeding. Refusing a single minor exhibit probably won’t qualify. Shutting out an entire category of relevant evidence can.¹

Exceeding Powers or Failing to Issue a Definite Award

When an arbitrator decides issues the arbitration agreement never authorized, or delivers an award so incomplete or ambiguous that it doesn’t resolve the dispute, a court can intervene. An award that addresses a claim the parties never submitted to arbitration is the clearest example. An award so vague that neither side can tell who owes what to whom is another.¹

Does Manifest Disregard of the Law Still Work

Before Hall Street, many federal courts recognized a judge-made ground: that the arbitrator knew the governing law and deliberately ignored it. The 2008 decision declared the statutory grounds exclusive but left open whether manifest disregard might survive as a “judicial gloss” on those categories rather than an independent ground.

The circuits split on the answer. The Second, Fourth, Sixth, and Ninth Circuits still treat manifest disregard as a valid basis, typically framing it as shorthand for an arbitrator exceeding their powers. The Fifth, Seventh, Eighth, and Eleventh Circuits have rejected it entirely, holding that the four statutory grounds are the only permissible bases for review. Several other circuits have left the question open. If your arbitration took place in a circuit that has rejected the doctrine, raising it in your motion wastes space and could invite sanctions.

When Modification Is the Right Remedy Instead

Not every error requires throwing out the award. Section 11 of the FAA allows courts to modify or correct an award in three narrower situations:

Miscalculations, such as an obvious math error in the damages figure.
Description mistakes, such as a wrong name, date, or property description that doesn’t affect the substance of the decision.
Form defects, meaning problems with how the award is written that don’t change the merits.

Modification preserves the rest of the award and corrects only the specific error. If your complaint is that the arbitrator got the arithmetic wrong but otherwise ran a fair proceeding, Section 11 modification is the right remedy, not Section 10 vacatur.²

The Three-Month Deadline

A motion to vacate must be served on the opposing party within three months after the award is filed or delivered. This is one of the shortest deadlines in federal civil practice, and the clock starts when the award lands, not when you decide you’re unhappy with the result.³

At least one federal appeals court has held that this deadline is not strictly jurisdictional and that equitable tolling can apply in extraordinary circumstances. Counting on that exception is a losing strategy. Meanwhile, the opposing party has up to one year to ask a court to confirm the award as a binding judgment, which adds pressure to move quickly.⁴

Where to File

The FAA directs the motion to the U.S. district court for the district where the award was made. If the arbitration agreement designates a specific court, you can file there instead.⁴

Venue is only half the problem. The FAA itself does not create federal jurisdiction. You still need an independent basis for the federal court to hear your case, such as diversity of citizenship between the parties or a federal question embedded in the underlying dispute. If neither exists, the challenge may have to go to state court under that state’s arbitration statute.

What to File With the Motion

Pull the full arbitration record before drafting. At a minimum you need:

The signed award, which is the document the court is being asked to vacate.
The arbitration agreement, which establishes the scope of the arbitrator’s authority.
Hearing transcripts and exhibits, which are essential if the challenge involves misconduct, refusal to hear evidence, or the arbitrator acting outside the scope of the agreement. Without a record of what happened at the hearing, most procedural challenges collapse.
Correspondence about conflicts, including any disclosures or failures to disclose regarding the arbitrator’s relationships with the parties.

Supporting evidence should be organized as numbered exhibits attached to the motion. After filing, the motion and any accompanying summons must be served on the opposing party or their attorney under Federal Rule of Civil Procedure 4, with proof of service then filed with the court.⁵

The Sanctions Risk

Filing a vacatur motion without a genuine statutory basis is not a free shot. Federal courts have sanctioned parties who challenge arbitration awards on grounds that have no support in the statute or controlling case law. The Seventh Circuit has warned that challenges to commercial arbitration awards “bear a high risk of sanctions because such challenges undermine the integrity of the arbitral process.” If the real objection is that the arbitrator weighed the evidence wrong, a motion to vacate will almost certainly fail and could cost you the other side’s attorney fees on top of your own.

What the Court Does With the Motion

The opposing party will almost always respond with a cross-motion to confirm the award. The court then has both requests in front of it and typically schedules oral argument. Judges are not retrying the underlying dispute. The inquiry focuses on whether the arbitration process failed in one of the narrow ways the statute recognizes.

If the court finds a valid ground for vacatur, it has a few options. It can vacate the award outright, ending its legal effect. If the time limit in the original arbitration agreement hasn’t expired, the court may send the case back for a rehearing before the same arbitrators.¹ Courts also sometimes remand to the original arbitrator for clarification when the award is ambiguous rather than fundamentally flawed. Where the ground involves the arbitrator’s own bias or corruption, assignment to a new arbitrator is the more likely result.

If the court denies the motion, it typically confirms the award, converting it into a court judgment enforceable through the usual collection mechanisms, including wage garnishment and liens on property.

Appealing the Decision

A district court order vacating, modifying, or confirming an arbitration award is appealable to the circuit court of appeals.⁶ The notice of appeal must be filed within 30 days of the district court’s order.⁷ The appellate court reviews legal conclusions without deference but applies the same narrow standard to the underlying award, which means an appeal after a denied vacatur motion faces two layers of difficulty: the court must find both that the district court made a legal error and that a statutory ground for vacatur was actually met.

1
Office of the Law Revision Counsel. 9 USC 10 – Same; Vacation; Grounds; Rehearing
2
Office of the Law Revision Counsel. 9 USC 11 – Same; Modification or Correction; Grounds; Order
3
Office of the Law Revision Counsel. 9 USC 12 – Notice of Motions to Vacate or Modify; Service; Stay of Proceedings
4
Office of the Law Revision Counsel. 9 USC 9 – Award of Arbitrators; Confirmation; Jurisdiction; Procedure
5
Legal Information Institute. Federal Rules of Civil Procedure Rule 4 – Summons
6
Office of the Law Revision Counsel. 9 USC 16 – Appeals
7
Legal Information Institute. Federal Rules of Appellate Procedure Rule 4 – Appeal as of Right; When Taken