Incident Tracker / United States (state)
Landberg v. City of New York
·Supreme Court of New York, Appellate Division, Second Department·US-STATEFineprovisional
The New York Appellate Division, Second Department sanctions attorney Michael Sanders and Law Offices of Michael S. Lamonsoff, PLLC after an appellate brief used GenAI-assisted research. The court finds nonexistent cases, fictitious Court of Appeals quotations and misstatements, ordering $8,000 and $2,500 sanctions.
- Court
- Supreme Court of New York, Appellate Division, Second Department
- Date
- 2026-06-23
- Who used the AI
- Lawyer
- AI tool
- generative artificial intelligence (hereinafter GenAI)
- Conduct
- An attorney filed a GenAI-assisted appellate brief with nonexistent cases, fabricated Court of Appeals quotations and misrepresentations of real holdings; the law firm name appeared on the brief.
- Outcome
- Fine
- Penalty
- US$10,500
- Regulatory outcome
- No separate regulatory disposition recorded
- Status
- Provisional — written by the court-decisions pipeline, awaiting the editor
- Last checked
- 2026-09-07
Primary sources for this incident
Related regulation records for this incident
No related regulation record has been linked to this incident yet.
Similar incidents on the record
- Capital Standard, LLC v. U.S. Bank National Association, No. 2D2024-1392 (Fla. 2d DCA)2026-08-21 · Florida Second District Court of Appeal · FineFlorida's Second District Court of Appeal affirmed a foreclosure-related declaratory judgment and, in a separate section citing the Charlotin database, fined appellant's counsel USD 1,500, awarded U.S. Bank its appellat…
- Scott v. Illinois Human Rights Commission, 2026 IL App (1st) 2514622026-07-28 · Appellate Court of Illinois, First District · FineThe Appellate Court of Illinois, First District, affirmed dismissal of a Starbucks employee's discrimination charge and sanctioned her lawyer USD 15,000 under Supreme Court Rule 375 for ten AI-hallucinated statutory quo…
- Del Biaggio v. Bansen, No. A174647 (Cal. Ct. App., 1st Dist., Div. 4)2026-07-10 · California Court of Appeal, First Appellate District, Division Four · FineIn a published opinion in an attorney-fee appeal, the California Court of Appeal, First District, fined attorney Floyd USD 1,500 for misstatements and false quotations attributed to the Gorman and PLCM decisions. The ca…
- Douglas v. Deutsche Bank National Trust Co., No. 24-CV-1099 (D.C. Ct. App.)2026-09-03 · District of Columbia Court of Appeals · Regulatory referralIn the District of Columbia Court of Appeals, Deutsche Bank's appellee brief cited four nonexistent authorities after counsel used Google's generative AI search tool without verification. The court struck the brief, ref…
Cite this record
SafeLegalAI Global Legal AI Incident Tracker, “Landberg v. City of New York”, safelegalai.com/tracker/landberg-v-city-of-new-york (accessed 2026-09-08). Data: CC BY 4.0.