Mobley v. Workday: a court cleared an AI hiring tool to be challenged at collective-action scale

What the court did

On May 16, 2025, U.S. District Judge Rita F. Lin of the Northern District of California signed an order in Mobley v. Workday, Inc. (Case No. 23-cv-00770-RFL) titled “ORDER GRANTING PRELIMINARY COLLECTIVE CERTIFICATION,” which concludes that “Mobley’s Motion for Conditional Certification of Collective Action (Dkt. No. 106) is GRANTED, and notice should issue to the collective members” source. Reporting the order independently, CNN Business wrote that “Judge Rita Lin’s Friday preliminary order will allow the case to proceed as a collective action suit — similar to a class action,” and that “Workday is facing a collective action lawsuit alleging that its job applicant screening technology is discriminatory, following an order by a California district judge on Friday” source. A Holland & Knight client alert reported the same holding firsthand, noting the court “granted preliminary certification under ADEA, allowing the lawsuit to move forward as a nationwide collective action” source.

What the court certified

The certified age-discrimination (ADEA) collective covers “individuals aged 40 and over who, from September 24, 2020, through the present” applied for jobs through Workday’s platform and were denied employment recommendations source, a scope Holland & Knight summarized as “ages 40 and older who were denied employment recommendations through Workday’s platform since Sept. 24, 2020” source. The court rejected Workday’s objection that the collective was simply too large to notify, writing: “If the collective is in the ‘hundreds of millions’ of people, as Workday speculates, that is because Workday has been plausibly accused of discriminating against a broad swath of applicants” source. The “hundreds of millions” figure is Workday’s own speculation about the collective’s size, quoted by the court, not a court finding of that many victims source.

Why an AI tool could be certified at this scale

The court found the collective members “alike in the central way that matters: they were allegedly required to compete on unequal footing due to Workday’s discriminatory AI recommendations,” and framed the common question as whether “that system has a disparate impact on applicants over forty” source. Lead plaintiff Derek Mobley, per CNN, says he was “rejected from more than 100 jobs on the platform over seven years because of his age, race and disabilities” source.

What this is, and what it is not

This is a procedural certification: it lets opt-in notice go out to potential collective members. It is not a merits ruling that Workday discriminated; the “discriminatory AI recommendations” language appears inside the court’s description of the allegations it credits as plausible at the notice stage source. Workday denies wrongdoing and has characterized the case as without merit source. This is a court-origin record, byte-tied to the primary order: green depends only on TIN’s independent check against the public record, never on any party confirming it.

The weakest load-bearing link, named where you meet it: the critical fact, that the May-16-2025 order granting preliminary ADEA collective certification exists and says what is quoted, rests firmest on the Tier-1 court order itself, which is byte-tied to the Internet Archive RECAP mirror. Its two corroborating secondaries are both strong but neither is a wire-service audit: CNN is original “New York CNN” reporting and Holland & Knight is a law-firm client alert (firm analysis, not provider marketing), each independent of the other and of the Reuters wire. A second newswire on the exact certification could not be byte-tied from this host (Reuters had no reachable Wayback 200 capture; HR Dive 403s every fetcher), so the record here is two independent secondaries plus the primary, not a wire-confirmed consensus.

How this was verified

• Method: Every quoted line was read verbatim from the archived captures in sources/ and sources/captures/ and re-bound this session; no figure is paraphrased, rounded, or recalled.
• Primary anchor (Tier 1): the signed N.D. Cal. Order, Dkt. No. 128 (filed 05/16/2025), Case No. 23-cv-00770-RFL, is byte-tied: the local PDF (sources/order128-mobley-workday-nd-cal-20250516.pdf, 320,628 bytes, sha1 cce3bb15b38093122ffe40ef1f42563863d6a131) matches the Internet Archive RECAP item gov.uscourts.cand.408645 file .128.0.pdf by sha1 and size, independently re-verifiable without auth. Quotes were checked against its 20-page pdf-parse text extraction (sources/captures/order128-nd-cal-mobley-workday-20250516.txt).
• Independent secondary #1 (Tier 2): CNN Business (Clare Duffy), byte-tied to Wayback capture 20250523034701 (CDX digest WF6N3EBFS2G4FZF2I25WODN6VYWXGA6R == sha1-b32 of the stored id_ payload); original reporting, no Reuters credit in the body.
• Independent secondary #2 (Tier 2): Holland & Knight client alert, “Federal Court Allows Collective Action Lawsuit Over Alleged AI Hiring Bias” (May 27, 2025), byte-tied to Wayback capture 20250528132642 (stored 13,712-byte payload sha1-b32 ZEXULXU3SCQP34QNLWDTGRYKBW566K5T == CDX digest); original firm analysis linking straight to the order, independent of both CNN and the Reuters wire (zero “reuters”/“cnn” strings in the body).
• Conflation guards: this is procedural certification (opt-in notice), NOT a merits finding; “hundreds of millions” is Workday’s own speculation quoted by the court, not a headcount of victims; the certified collective is the ADEA (age 40+) claim only (the race/disability theories are part of the broader suit but not this collective); later July-2025 HiredScore and 2026 FEHA developments are NOT asserted here.
• Open item (human, post-graduation): a clerk/counsel confirmation that the May-16-2025 Order stands (not stayed, vacated, or amended on reconsideration or appeal), the exact collective definition, and Workday’s on-record response. Green never depends on that call landing; it is a courtesy step, not the proof.
• Verified on: 2026-08-09 (presentation rebuilt 2026-08-18).

Related case files

• SafeRent settles a class action over its algorithmic tenant-screening scores for $2.275M: the closest sibling, an automated scoring system challenged at class scale for discriminatory impact, resolved through the courts rather than by the vendor’s own account.
• The EEOC’s first AI hiring settlement: iTutorGroup pays $365K for age-screening applicants: the closest legal precedent, an AI applicant-screening system challenged for age discrimination and resolved through a federal enforcement process rather than the vendor’s own account.
• SEC penalizes Delphia and Global Predictions $400K for “AI washing”: the accountability shape at the regulator level, claims about AI tested against the public record and enforced, not taken on trust.

Sources

1. [Tier 1] U.S. District Court, N.D. Cal. · “Order Granting Preliminary Collective Certification,” Mobley v. Workday, Inc., No. 23-cv-00770-RFL, Dkt. No. 128 · May 16, 2025 · https://www.courtlistener.com/docket/66831340/128/mobley-v-workday-inc/
2. [Tier 2] CNN Business (Clare Duffy) · “Lawsuit claims discrimination by Workday’s hiring tech prevented people over 40 from getting hired” · May 22, 2025 · https://www.cnn.com/2025/05/22/tech/workday-ai-hiring-discrimination-lawsuit
3. [Tier 2] Holland & Knight · “Federal Court Allows Collective Action Lawsuit Over Alleged AI Hiring Bias” · May 27, 2025 · https://www.hklaw.com/en/insights/publications/2025/05/federal-court-allows-collective-action-lawsuit-over-alleged