Appealing an Arbitration Decision: When and How
Published: Mar 09, 2026 · Updated: Mar 09, 2026 · 7 min read.
Published: Mar 09, 2026
Updated: Mar 09, 2026
7 min read.
Published: Mar 09, 2026 · Updated: Mar 09, 2026 · 7 min read.
Published: Mar 09, 2026
Updated: Mar 09, 2026
7 min read.
If you have just received an unfavorable arbitration award, your first instinct may be to appeal arbitration the same way you would a trial court verdict. But arbitration does not work like litigation. One of the core advantages of arbitration is finality --- and that finality comes with a trade-off: the grounds for overturning an award are extremely narrow.
That does not mean you have zero options. Federal and state law provide specific, limited pathways to challenge arbitration outcomes. Understanding these pathways --- what they require, when they apply, and how fast you must act --- can mean the difference between preserving your rights and waiving them entirely.
The U.S. Supreme Court set the modern standard in Hall Street Associates, LLC v. Mattel, Inc., 552 U.S. 576 (2008). The Court ruled that the grounds for vacating an award under the Federal Arbitration Act (FAA) are the exclusive bases for judicial review --- parties cannot expand them by private agreement.
The practical result: courts treat arbitration awards with heavy deference. Judges do not re-weigh evidence or substitute their judgment for the arbitrator's. The question on review is not whether the arbitrator got it right, but whether the process was fundamentally flawed.
The Federal Arbitration Act, 9 U.S.C. Section 10, lists four specific grounds on which a court may vacate an arbitration award.
A court may vacate an award procured through corruption, fraud, or undue means. You must show that the winning party engaged in deliberate misconduct --- such as bribing a witness, fabricating documents, or hiding evidence subject to a disclosure obligation --- and that the misconduct materially affected the outcome. Mere allegations of dishonesty are not enough.
Under 9 U.S.C. Section 10(a)(2), an award may be vacated where there was evident partiality or corruption in the arbitrator. The most common version of this claim involves undisclosed conflicts of interest --- for example, the arbitrator had a financial relationship with one party and failed to disclose it.
The standard varies by circuit. Some federal courts require proof that a "reasonable person would have to conclude" the arbitrator was biased. Others apply a lower threshold. Either way, you must show a concrete, undisclosed relationship --- not just general dissatisfaction with the ruling.
This ground covers procedural unfairness: refusing to grant a reasonable continuance, excluding relevant evidence without justification, conducting ex parte communications with one party, or failing to provide adequate notice of the hearing time and place (sometimes called imperfect notice). You must generally show the misconduct caused actual prejudice to your case.
This applies when the arbitrator decided issues not submitted, awarded relief not authorized by the agreement, or ignored explicit limitations in the arbitration clause. For example, if a contract caps damages at $100,000 and the arbitrator awards $250,000, that may qualify. Courts are careful, though, not to use this ground as a back door for reviewing the merits.
Under 9 U.S.C. Section 11, a court may modify or correct an award --- rather than throw it out entirely --- when there is an evident material miscalculation of figures, the arbitrator awarded on a matter not submitted (but the rest of the award can stand), or the award is imperfect in form but sound on the merits.
Before Hall Street (2008), many courts recognized a judicially created ground for vacating awards: "manifest disregard of law." Under this doctrine, a court could vacate an award if the arbitrator knew the governing legal rule and chose to ignore it.
After Hall Street, the status of this doctrine is unsettled. The Supreme Court held that the FAA's statutory grounds are exclusive but did not say whether "manifest disregard of law" survives as a shorthand for exceeding powers. Circuit courts have split:
If you are considering a challenge on this basis, check the current law in your jurisdiction. This is an area where legal counsel familiar with arbitration is especially important.
Time is the single most critical factor after receiving an unfavorable award. Under 9 U.S.C. Section 12, a motion to vacate must be filed within three months (90 days) of the award being delivered to you. Miss this deadline, and you lose the right to challenge the award --- regardless of how strong your grounds might be.
Some state statutes impose different windows. California's Code of Civil Procedure Section 1288, for instance, allows 100 days but shortens the window to just 30 days if the other side files a petition for confirmation of the award first.
Before filing, consider the realistic picture:
Sometimes the better path is to accept the result and prepare more effectively if a future dispute arises.
The best way to avoid a post-award challenge is to get the arbitration right from the start. At Arbitration.net, our fully digital platform reduces the procedural errors and misunderstandings that lead to problematic awards in the first place. We handle evidence exchange, scheduling, and communications in a secure environment with real-time case tracking --- so both sides get a fair, well-organized process.
To discuss your situation or learn more about our services, reach us at (888) 885-5060 or visit arbitration.net.
No. Arbitration does not have a built-in appeals process. Instead, a party must file a motion to vacate in court under the narrow grounds in the Federal Arbitration Act (9 U.S.C. Section 10). Courts will not re-examine the arbitrator's factual or legal conclusions --- they only look at whether the process itself was fundamentally flawed.
Under FAA Section 10, a court may vacate an award if: (1) it was procured by corruption, fraud, or undue means; (2) there was evident partiality or corruption in the arbitrator; (3) the arbitrator engaged in misconduct such as refusing to hear material evidence or providing inadequate notice; or (4) the arbitrator exceeded their powers. All four grounds focus on the integrity of the process, not the correctness of the result.
Under federal law, you have 90 days (three months) from the date the award is delivered to you, as set by 9 U.S.C. Section 12. Some states impose different deadlines. Missing the deadline permanently bars your challenge.
The other party can petition the court for confirmation of the award under 9 U.S.C. Section 9. Once confirmed, the award becomes a court judgment enforceable through standard collection methods, including wage garnishment, bank levies, and property liens.
For general guidance on the arbitration process and preparing for the best possible outcome, explore arbitration.net or get in touch at (888) 885-5060. For specific legal advice about challenging a particular award, consult a qualified attorney experienced in arbitration law, as the standards and deadlines vary by jurisdiction.
This article is for educational purposes and is not legal advice. Consult a qualified attorney or contact Arbitration.net for guidance on your specific dispute.
