Anthony C. Hill v. Workday, Inc. (2)
N.D. California · Apr 28, 2026
What happened in this matter?
The court sanctioned Attorney Lenden Webb for filing a brief containing a fabricated citation and misrepresented authority, which was partially attributed to the use of the CoCounsel AI tool. The court ordered an admonishment, a $1,001 personal fine, four hours of live CLE, and mandatory circulation of the sanctioning orders and CLE materials within the attorney's firm.
- Why the court cared
- The court reasoned that the attorney of record has a non-delegable duty to verify the accuracy of all citations in filings, regardless of the research source. The court found that the attorney's failure to supervise junior staff and his reliance on AI tools without adequate verification undermined the judicial process and the rule of law. The court determined that sanctions were necessary to deter future misconduct and to reinforce the professional obligations of managing attorneys.
- Why it matters now
- This case underscores that managing attorneys are personally responsible for verifying AI-generated research. It establishes that even a single instance of a fabricated citation warrants sanctions, and that firm-wide remedial measures, such as mandatory CLE and internal circulation of orders, are standard responses to supervision failures.
Why this matter is tracked
In this employment litigation, the court sanctioned Attorney Lenden Webb for submitting a brief containing a fabricated case citation and misrepresenting the holding of another case. The court found that the errors were caused in part by the use of the CoCounsel AI tool and a failure of supervision by the attorney of record. The court emphasized that the duty to verify citations is non-delegable and applies regardless of whether research is conducted via traditional tools or generative AI. The court imposed sanctions including an admonishment, a $1,001 personal monetary fine, a requirement to complete four hours of live CLE, and an order to circulate the court's sanctioning documents and CLE materials to all firm staff.
This case underscores that managing attorneys are personally responsible for verifying AI-generated research. It establishes that even a single instance of a fabricated citation warrants sanctions, and that firm-wide remedial measures, such as mandatory CLE and internal circulation of orders, are standard responses to supervision failures.
Record details
What the record establishes about AI use
The attorney used Westlaw's CoCounsel AI tool.
Order following an Order to Show Cause regarding professional conduct and supervision failures.
Correction behavior is not separately verified in the current record.
Tracked discrepancy record
2 citation, quotation, or authority issues are recorded in the source dataset.
- Fabricated: Case Law | Filed brief included a citation to a nonexistent case; court found the citation fabricated and tied its inclusion in part to AI use.
- Misrepresented: Case Law | Court found the brief misrepresented the holding of a real case cited by counsel.
Questions this record answers
- What happened in Anthony C. Hill v. Workday, Inc. (2)?
- The court sanctioned Attorney Lenden Webb for filing a brief containing a fabricated citation and misrepresented authority, which was partially attributed to the use of the CoCounsel AI tool. The court ordered an admonishment, a $1,001 personal fine, four hours of live CLE, and mandatory circulation of the sanctioning orders and CLE materials within the attorney's firm.
- Why does Anthony C. Hill v. Workday, Inc. (2) matter for legal AI risk?
- This case underscores that managing attorneys are personally responsible for verifying AI-generated research. It establishes that even a single instance of a fabricated citation warrants sanctions, and that firm-wide remedial measures, such as mandatory CLE and internal circulation of orders, are standard responses to supervision failures.
- What does the public record establish about Anthony C. Hill v. Workday, Inc. (2)?
- The record summarizes the outcome described in the linked public source. The recorded document is hosted in the upstream publisher archive. This page is not a substitute for the complete docket, subsequent history, or jurisdiction-specific advice.
- Which source supports this Anthony C. Hill v. Workday, Inc. (2) summary?
- The recorded source is Damien Charlotin case archive. It is classified as publisher document archive; review the linked material and subsequent docket history before relying on this summary.
Related matters
Related by court, jurisdiction, tool, or classified failure pattern. Similarity does not imply the same facts or outcome.