Incidents gathered from public reporting around the world. Each one links to the articles it came from. None of it is a finding that anyone broke the law.
Reports people file about their own experience are not shown here and never will be without their agreement. Tell us what happened to you.
5 incidents involving Thomson Reuters · search all text for “Thomson Reuters Corporation” instead · public reporting
The AI system generated false legal citations that were included in a court filing, misleading the court and opposing counsel.
1 source article · read the reporting →
The AI tool generated fictitious case law citations that were included in a court filing, affecting the plaintiff and the court.
1 source article · read the reporting →
Two law firms submitted a supplemental brief containing fake legal citations generated by AI systems including Google Gemini and Westlaw's CoCounsel. Judge Michael Wilner imposed $31,000 in sanctions after discovering the citations were fabricated. The lawyers admitted using AI without proper review or disclosure.
5 source articles · read the reporting →
Heather Hersh, an appellate attorney, used generative AI to draft a reply brief in a Fair Credit Reporting Act case. The brief contained multiple fabricated legal quotations and inaccurate assertions. The Fifth Circuit Court of Appeals found that Hersh failed to verify the AI-generated content and was not candid about her use of AI, imposing a $2,500 monetary sanction under FRAP 46(c) and inherent authority. The court emphasised that attorneys must verify AI outputs and remain honest with the court.
4 source articles · read the reporting →
Attorneys from Ellis George LLP and K&L Gates LLP submitted a brief to a special master in the U.S. District Court for the Central District of California containing numerous hallucinated legal citations generated by AI tools including CoCounsel, Westlaw Precision, and Google Gemini. The lawyers failed to verify the citations, and even after being alerted to errors, filed a corrected brief that still contained fake authorities. Special Master Michael Wilner found the conduct tantamount to bad faith, struck the brief, denied discovery relief, and ordered the firms to jointly pay $31,100 in the defendant's legal fees.
3 source articles · read the reporting →
