Modifying or Correcting an Arbitration Award
Arbitration awards are not automatically final in every respect — federal and state law provide narrow procedural mechanisms for parties to seek correction or modification of an award before or after judicial confirmation. This page covers the statutory grounds for modification, the procedural framework governing requests, the distinction between modification and vacatur, and the practical boundaries that courts apply when reviewing such requests. Understanding these limits is essential for any party evaluating whether an award reflects a correctable error or requires a more adversarial challenge.
Definition and scope
Modification and correction of an arbitration award refers to the limited judicial or arbitral power to alter specific elements of a final award without disturbing its underlying merits determination. The power is narrower than vacating an arbitration award, which seeks to annul the award entirely, and is distinct from confirming an arbitration award, which gives the award the force of a court judgment without alteration.
The primary federal authority governing this process is the Federal Arbitration Act (FAA), 9 U.S.C. § 11, which enumerates exactly three grounds on which a federal court may modify or correct an award:
- Where there is an evident material miscalculation of figures or an evident material mistake in the description of a person, thing, or property referred to in the award.
- Where the arbitrators have awarded upon a matter not submitted to them, unless it is a matter not affecting the merits of the decision upon the matter submitted.
- Where the award is imperfect in matter of form not affecting the merits of the controversy.
State-level authority derives largely from the Revised Uniform Arbitration Act (RUAA), adopted in whole or part by more than 20 states, which contains parallel but sometimes broader modification grounds in Section 24. The original Uniform Arbitration Act, still operative in several jurisdictions, provides similar but less detailed language. Where state arbitration law applies rather than the FAA, the applicable state statute controls the permissible grounds and timelines.
How it works
The procedural framework for modification operates in two distinct phases: the pre-confirmation period, during which a party may petition the court, and the narrow post-confirmation window, during which the award has already been reduced to judgment.
Phase 1 — Filing the application
Under 9 U.S.C. § 12, a motion to modify or correct an award must be filed within 3 months after the award is filed or delivered. This deadline is jurisdictional in most federal circuits and is not subject to equitable tolling under most interpretations. The motion must be filed in the court specified in the arbitration agreement or, absent such specification, in the United States District Court for the district in which the award was made.
Phase 2 — Court review
Courts apply a highly deferential standard. The reviewing court does not reassess the merits of the underlying dispute. It examines only whether the alleged error falls within one of the three enumerated FAA categories — or the parallel state-law categories under the RUAA. If the claimed error reflects a disagreement with the arbitrator's legal reasoning or factual conclusions, the motion will be denied.
Phase 3 — Correction order
If the court finds a qualifying error, it issues an order modifying the award and confirming it as modified. The corrected award then carries the same legal force as a confirmed original award, subject to enforcement under enforcing an arbitration award procedures.
Some arbitration rules — including AAA Commercial Arbitration Rules, Rule 50 — also permit parties to request correction directly from the arbitrator within 20 days of the award, providing a faster administrative alternative to judicial modification for clerical errors.
Common scenarios
The following are the fact patterns most frequently raised in modification proceedings:
- Arithmetic or computational errors: An arbitrator awards $1,247,500 in damages but the underlying calculation in the award document reflects a sum of $1,274,500. The $27,000 transposition is a material miscalculation within FAA § 11(a).
- Description errors: An award transferring real property identifies the parcel by an incorrect legal description or incorrect acreage figure. This falls within the "mistake in description" ground.
- Exceeding submission: An arbitration clause covers contract disputes but the panel awards relief on a tort claim not submitted in the demand. The excess portion may be subject to modification or partial vacatur under FAA § 11(b). See the overview of arbitration-process-steps for how submission scope is defined at the outset.
- Form defects: An award omits a required recitation or uses an incorrect party name consistently throughout, creating enforcement ambiguity without altering any substantive determination.
Modification is not available for: disagreement with the arbitrator's legal analysis, re-weighing of evidence, errors of law, or claims that the arbitrator reached the wrong conclusion on the merits. Courts — including in Major League Baseball Players Ass'n v. Garvey, 532 U.S. 504 (2001) — have consistently rejected invitations to use modification as a backdoor merits review.
Decision boundaries
The most critical distinction in this area is between a correctable error (within FAA § 11 or RUAA § 24) and a reviewable error (within the separate vacatur standards of FAA § 10 or RUAA § 23). Courts treat these as mutually exclusive tracks:
| Error Type | Applicable Track | Statutory Authority |
|---|---|---|
| Mathematical miscalculation | Modification | FAA § 11(a); RUAA § 24(a)(1) |
| Award on unsubmitted matter | Modification or partial vacatur | FAA § 11(b); FAA § 10(a)(4) |
| Form defect | Modification | FAA § 11(c); RUAA § 24(a)(3) |
| Arbitrator misconduct | Vacatur only | FAA § 10(a)(2)–(3) |
| Manifest disregard of law | Vacatur only (split among circuits) | Common law / FAA § 10(a)(4) |
| Fraud or corruption | Vacatur only | FAA § 10(a)(1) |
A second critical boundary separates modification from re-arbitration. Where an award contains an error too substantial to fix by court order — for instance, where the entire damages calculation is infected by a methodological error — the remedy, if any, is vacatur and remand to the panel, not judicial modification. Courts lack authority under the FAA to substitute their own damages figure.
Parties operating under institutional rules should also examine whether those rules permit or require that a correction request be submitted to the arbitral tribunal before filing with a court. Under JAMS Arbitration Rules, Rule 24(j), for example, a party may request correction of computational or clerical errors within 7 days of receipt of the award, and failure to exhaust this administrative step may affect the procedural posture of a subsequent court application. The interplay between institutional rules and judicial modification timelines requires careful coordination, particularly in commercial arbitration contexts where both FAA and institutional deadlines run concurrently.
References
- Federal Arbitration Act, 9 U.S.C. § 11 — Modification and Correction
- Federal Arbitration Act, 9 U.S.C. § 10 — Vacatur
- Revised Uniform Arbitration Act (2000) — Uniform Law Commission
- AAA Commercial Arbitration Rules, Rule 50 (Correction of Award)
- JAMS Comprehensive Arbitration Rules, Rule 24(j)
- GovInfo — Title 9, United States Code (Full Text)