Attorneys Sanctioned for Submitting AI-Generated Legal Briefs with Fabricated Content

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Two Orange County immigration attorneys, Mike Singh Sethi and William Rounds, were suspended and fined by the U.S. 9th Circuit Court of Appeals after submitting legal briefs containing fabricated cases and misattributed quotations generated by AI. Their lack of candor about the AI's role led to stricter sanctions.[AI generated]

Why's our monitor labelling this an incident or hazard?

The attorneys used generative AI to produce legal briefs that contained multiple fabricated cases and misattributed quotations, which are clear inaccuracies caused by AI hallucinations. These false statements were knowingly or recklessly submitted to the court, violating ethical and procedural rules. The AI system's malfunction directly led to a breach of legal obligations and professional conduct, constituting harm under the category of violations of human rights or breach of legal obligations. Hence, this event meets the criteria for an AI Incident.[AI generated]
AI principles
AccountabilityTransparency & explainability

Industries
Government, security, and defence

Affected stakeholders
WorkersGeneral public

Harm types
ReputationalPublic interest

Severity
AI incident

Business function:
Compliance and justice

AI system task:
Content generation


Articles about this incident or hazard

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O.C. immigration attorneys suspended for filing briefs filled with AI-hallucinated errors

2026-06-04
Los Angeles Times
Why's our monitor labelling this an incident or hazard?
The attorneys used generative AI to produce legal briefs that contained multiple fabricated cases and misattributed quotations, which are clear inaccuracies caused by AI hallucinations. These false statements were knowingly or recklessly submitted to the court, violating ethical and procedural rules. The AI system's malfunction directly led to a breach of legal obligations and professional conduct, constituting harm under the category of violations of human rights or breach of legal obligations. Hence, this event meets the criteria for an AI Incident.
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Sloppy AI use gets two California lawyers suspended for six months, fined

2026-06-03
San Francisco Chronicle
Why's our monitor labelling this an incident or hazard?
The article explicitly states that the lawyers used AI to generate legal briefs that contained false citations, which is a direct misuse of AI outputs leading to harm in the legal system, including violations of duties of competence, diligence, and candor. The fabricated citations misled the court, which is a violation of legal and ethical standards, thus constituting harm to the legal process and potentially to the rights of the asylum seekers involved. The disciplinary sanctions and court findings confirm the harm has materialized. Hence, this is an AI Incident as the AI system's use directly led to harm.
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Orange County immigration attorneys suspended for filing briefs filled with AI-hallucinated errors

2026-06-04
ArcaMax
Why's our monitor labelling this an incident or hazard?
The event explicitly involves the use of a generative AI system to produce legal briefs that contained multiple fabricated cases and misattributed quotations, which are direct harms related to violations of legal and ethical obligations. The AI's hallucinations led to false statements being submitted to the court, which is a breach of legal rights and obligations. The disciplinary action by the court confirms the harm occurred and was directly linked to the AI system's malfunction and the attorneys' misuse. Therefore, this qualifies as an AI Incident due to the realized harm caused by the AI system's outputs in a legal context.
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Ninth Circuit on AI Hallucinations

2026-06-03
Reason
Why's our monitor labelling this an incident or hazard?
The event involves the use and misuse of generative AI systems in legal brief drafting, leading to fabricated and inaccurate legal citations and quotations. These AI hallucinations caused direct harm by misleading the court and violating ethical and procedural rules, resulting in disciplinary sanctions. The court's detailed analysis and sanctions demonstrate that the AI system's malfunction (hallucinations) directly led to harm. Therefore, this qualifies as an AI Incident under the framework, as the AI system's use and malfunction directly caused significant harm to the legal system and professional conduct.
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O.C. immigration attorneys suspended for filing briefs filled with AI-hallucinated errors

2026-06-04
Yahoo
Why's our monitor labelling this an incident or hazard?
The attorneys used generative AI to produce legal briefs that included multiple fabricated cases and misattributed quotations, which were submitted to a court. This misuse of AI led to false statements being made in official legal documents, resulting in disciplinary sanctions. The AI system's hallucinations directly caused harm by undermining the integrity of legal proceedings and violating ethical and legal rules. The court's ruling and sanctions confirm that the AI's role was pivotal in causing this harm, meeting the criteria for an AI Incident involving violations of applicable law and professional rights.
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Attorneys' lack of candor over AI errors leads to stricter sanctions

2026-06-04
ABA Journal - Law News Now
Why's our monitor labelling this an incident or hazard?
The event explicitly mentions the use of generative AI that produced hallucinations in legal briefs, which were filed with the court. The AI-generated errors caused harm by misleading the court and violating legal ethical standards, leading to sanctions. This constitutes a violation of legal obligations and professional conduct rules, fitting the definition of an AI Incident under violations of human rights or breach of applicable law. The harm is indirect but material, as the AI system's outputs were relied upon without proper verification, causing legal misconduct.
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Orange County immigration attorneys suspended for filing briefs filled with AI-hallucinated errors

2026-06-04
Eagle-Tribune
Why's our monitor labelling this an incident or hazard?
The attorneys used generative AI to create legal documents with multiple fabricated cases and misattributed quotations, which is a misuse of AI leading to violations of legal obligations and professional conduct. This misuse has caused harm by undermining the integrity of legal proceedings and violating legal and ethical standards, fitting the definition of an AI Incident due to violations of obligations under applicable law protecting fundamental rights and legal processes.
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Ninth Circuit Warns of AI Hallucinated Briefs in Sanctions Order

2026-06-03
news.bloomberglaw.com
Why's our monitor labelling this an incident or hazard?
The event involves the use of a generative AI system to draft legal briefs, which produced inaccurate and hallucinated content. This misuse led to sanctions by a federal court, indicating a breach of legal and professional obligations. The AI system's role in generating false information that was submitted in official legal documents constitutes an AI Incident under the framework, as it indirectly caused harm by undermining legal process integrity and violating legal obligations. Hence, this is classified as an AI Incident.
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O.c. Immigration Attorneys Suspended For Filing Briefs Filled With Ai-hallucinated Errors

2026-06-04
Breaking News, Latest News, US and Canada News, World News, Videos
Why's our monitor labelling this an incident or hazard?
The event explicitly involves the use of a generative AI system to create legal briefs that contained multiple fabricated cases and misattributed quotations, which are direct consequences of AI hallucinations. This misuse led to the filing of false information in a court of law, violating legal and ethical standards. The tribunal's disciplinary action confirms the harm was realized and linked to the AI system's outputs. Hence, the event meets the criteria for an AI Incident due to the direct harm caused by the AI system's malfunction (hallucinations) in a legal setting.