Employment Litigation · Primary-source case analysis

Lamps Plus: Ambiguity Did Not Establish Consent to Class Arbitration

By Aneeta Mishra and Timothy Chan

Published April 18, 2026

Decision: Lamps Plus, Inc. v. Varela, No. 17-988 (U.S. Apr. 24, 2019), official slip opinion.

Lamps Plus, Inc. v. Varela did not hold that class arbitration is always unavailable. It held that an ambiguous agreement could not supply the necessary consent to that procedure under the Federal Arbitration Act. The majority accepted the lower court’s ambiguity determination for its analysis; it did not independently decide every disputed interpretation of the contract.

The employer sought individual arbitration, not the class procedure ordered

After a hacker obtained employee tax information, Frank Varela sued on behalf of a proposed class. The district court compelled class arbitration and dismissed the suit, although Lamps Plus had requested individual arbitration. The Supreme Court found appellate jurisdiction over the final arbitration-related decision; the company had not received the relief it sought. No party had requested a stay. This recounts that case’s posture, not a general instruction to dismiss every arbitrable lawsuit. Lamps Plus, slip op. at 2–5 & n.1.

Ambiguity was the premise, not a fresh factual finding

The majority deferred to the Ninth Circuit’s interpretation of California law and treated the agreement as ambiguous. It then asked whether that ambiguity provided a sufficient contractual basis for class arbitration. Its answer was no because class arbitration changes fundamental aspects of the individualized procedure the FAA contemplates. That is different from a finding that every broadly worded clause necessarily excludes an express agreement to class proceedings. Lamps Plus, slip op. at 5–9.

Construing against the drafter did not supply the missing consent

The Ninth Circuit used California’s rule construing unresolved ambiguity against the drafter. The majority held that this default could not create consent to class arbitration: In its analysis, the rule resolves ambiguity through policy considerations after ordinary interpretation fails to reveal intent. It did not abolish all state contract interpretation or every use of that rule in arbitration disputes. Lamps Plus, slip op. at 9–12 & n.5.

The Court left a separate decisionmaker question open

Footnote 4 said the Court had not decided whether class-arbitration availability is a gateway question of arbitrability. It did not decide that issue here because these parties agreed a court would resolve the class question. The judgment was reversed and remanded. Contractual consent to class proceedings and authority to decide that question should not be treated as the same inquiry. Lamps Plus, slip op. at 9 n.4, 12–13.

Key takeaways

• Read the actual language addressing class arbitration, if any.
• Keep ambiguity about class proceedings distinct from the scope of claims sent to arbitration.
• Identify any agreement allocating the class-availability question to a decisionmaker.
• Do not convert this case’s dismissal posture into a universal present-day stay rule.