An AI hiring bias lawsuit gets class status by proving numerosity, common questions, typical claims and adequate representation plus a Rule 23 category like predominance. Age-discrimination claims can also proceed as an opt-in collective where workers file written consent to join. Class status means one ruling can cover many applicants screened by the same tool.
Derek Mobley filed Mobley v. Workday, No. 3:23-cv-00770, in the Northern District of California on Feb. 21, 2023, alleging Workday screening rejected him from over 100 jobs based on race, age over 40 and disability, according to the University of Michigan Civil Rights Litigation Clearinghouse docket the ongoing case docket.
Official resources:
- Read the official guidance from Cornell — Use this primary source to verify the official guidance.
- Check eligibility on Clearinghouse’s official study page — Use this page to check the study’s participation requirements.
Table of Contents
- What is the difference between a collective and a class?
- What has the judge already allowed?
- What must plaintiffs still prove for Rule 23 status?
- How is AI bias legally measured?
- What should applicants do now?
- Frequently Asked Questions
What is the difference between a collective and a class?
An ADEA collective and a Rule 23 class use opposite membership rules. An ADEA collective requires each member to opt in by filing consent. A Rule 23 damages class ordinarily includes everyone in the definition unless they opt out. That difference affects notice, size and settlement review.
The opt-in rule was explained by Mondaq in its 2025 analysis of the Mobley preliminary certification the Mondaq analysis of preliminary certification. Rule 23 classes face stricter settlement-approval requirements because absent members are bound. For readers, the practical point is direct. Collective membership takes action. Class membership usually takes no action until a claim form or opt-out choice appears.
What has the judge already allowed?
On July 12, 2024, Judge Rita Lin ruled Workday can be sued as its employer-customers' agent under Title VII, the ADEA and the ADA. Delegation of screening was plausible because employers allegedly relied on Workday recommendations. The court rejected the separate employment-agency theory. On May 16, 2025, the court granted conditional certification of a nationwide ADEA collective. It covers applicants age 40 and older denied employment recommendations through Workday tools since Sept.
24, 2020, according to Secretariat the Secretariat summary of ADEA certification. Conditional certification permits notice and opt-ins, not a final win. On June 22, 2026, the court largely denied dismissal of the third amended complaint. It held California's FEHA can reach nonresident applicants because Workday allegedly designs and operates the tools from California. It also allowed an ADA claim alleging employment gaps proxy disability.
What must plaintiffs still prove for Rule 23 status?
Federal Rule 23(a) permits class treatment only with numerosity making joinder impracticable, common law or fact questions, typical representative claims and adequate representation. Plaintiffs must also fit one Rule 23(b) category, such as predominance and superiority, according to the Cornell Legal Information Institute's Rule 23 text the full text of Federal Rule 23. That test is harder for hiring software than for one workplace policy. Plaintiffs must link different employers, jobs and screens to common tool behavior.
They must also show individual hiring decisions do not overwhelm the common issue. No Rule 23 class has been certified. Plaintiffs' Sept. 14, 2026 motion covering HiredScore Spotlight, Fetch and Candidate Discovery remains pending toward a March 2027 hearing.
How is AI bias legally measured?
Most AI hiring claims use disparate impact, not proof of intent. A facially neutral selection practice is unlawful if it causes disproportionate exclusion by race, sex or another covered trait without job-relatedness and business necessity. Regulators apply older selection-rate screens to newer tools. EEOC's May 18, 2023 assistance applied that test and the four-fifths rule to AI hiring tools.
A selection rate below four-fifths of the highest group can signal adverse impact and trigger closer review. For Workday applicants, the question is statistical and job-specific. Do qualified older, Black or disabled applicants receive recommendations at materially lower rates. Then can the practice be justified or replaced by a less exclusionary alternative.
What should applicants do now?
.
- Save every Workday application confirmation, job number, employer name and rejection date.
- Keep resumes, cover letters and profiles as submitted, plus records of age, race or disability only if you choose to assert those claims.
- Watch for court-approved notice about opting into the ADEA collective or filing consent before the deadline.
- Do not assume inclusion in a future Rule 23 class means payment; no court has found Workday liable and no settlement fund exists, according to the JobCannon Oct. 7, 2026 review the JobCannon review of case status.
- More than 15,000 people opted into the ADEA collective while the Rule 23 motion remains pending.
Frequently Asked Questions
Am I automatically part of the Workday case if I applied through Workday?
No. The ADEA collective requires written opt-in consent, and no Rule 23 damages class has been certified.
Has Workday been found liable or agreed to pay claims?
No. Liability has not been decided, and no settlement or claim fund has been approved.
Which Workday tools are named in the pending Rule 23 request?
HiredScore Spotlight, Fetch and Candidate Discovery, with a hearing expected in March 2027.