Anthropic's Legal Team Apologizes for AI-Generated Citation Error in Copyright Case
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Anthropic's lawyer was forced to apologize after Claude hallucinated a legal citation
A lawyer representing Anthropic admitted to using an erroneous citation created by the company's Claude AI chatbot in its ongoing legal battle with music publishers, according to a filing made in a Northern California court on Thursday. Claude hallucinated the citation with "an inaccurate title
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Anthropic blames Claude AI for 'embarrassing and unintentional mistake' in legal filing
Jess Weatherbed is a news writer focused on creative industries, computing, and internet culture. Jess started her career at TechRadar, covering news and hardware reviews. Anthropic has responded to allegations that it used an AI-fabricated source in its legal battle against music publishers,
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Anthopic's law firm blames Claude hallucinations for errors
AI footnote fail triggers legal palmface in music copyright spat An attorney defending AI firm Anthropic in a copyright case brought by music publishers apologized to the court on Thursday for citation errors that slipped into a filing after using the biz's own AI tool, Claude, to format
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Anthropic expert accused of using AI-fabricated source in copyright case
May 13 (Reuters) - A federal judge in San Jose, California, on Tuesday ordered artificial intelligence company Anthropic to respond to allegations that it submitted a court filing containing a "hallucination" created by AI as part of its defense against copyright claims by a group of music
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Anthropic's lawyers take blame for AI 'hallucination' in music publishers' lawsuit
May 15 (Reuters) - An attorney defending artificial-intelligence company Anthropic in a copyright lawsuit over music lyrics told a California federal judge on Thursday that her law firm Latham & Watkins was responsible for an incorrect footnote in an expert report caused by an AI
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Anthropic Tried to Defend Itself With AI and It Backfired Horribly
The advent of AI has already made a splash in the legal world, to say the least. In the past few months, we've watched as a tech entrepreneur gave testimony through an AI avatar, trial lawyers filed a massive brief riddled with AI hallucinations, and the MyPillow guy tried to exonerate himself in
[7]
Anthropic Accused of Citing AI 'Hallucination' in Song Lyrics Lawsuit - Decrypt
The case adds to mounting legal pressure on AI developers, with OpenAI, Meta, and Anthropic all facing lawsuits over training models on unlicensed copyrighted material. An AI expert at Amazon-backed firm Anthropic has been accused of citing a fabricated academic article in a court filing meant to
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Anthropic's lawyers take blame for AI 'hallucination' in music publishers' lawsuit
An attorney defending artificial-intelligence company Anthropic in a copyright lawsuit over music lyrics told a California federal judge on Thursday that her law firm Latham & Watkins was responsible for an incorrect footnote in an expert report caused by an AI "hallucination." Ivana Dukanovic
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Anthropic's lawyers admit to using the company's AI chatbot Claude to generate a citation in a legal filing, resulting in hallucinated information. This incident highlights the risks of using AI in legal work and adds to the growing number of AI-related errors in courtrooms.
AI-Generated Citation Error in Anthropic's Legal Battle
In a significant development in the ongoing copyright lawsuit between music publishers and AI company Anthropic, the company's legal team has admitted to an embarrassing error caused by their own AI chatbot, Claude. Ivana Dukanovic, an attorney from Latham & Watkins representing Anthropic, filed a declaration explaining that Claude had generated an inaccurate citation in a legal document, leading to accusations of using fabricated sources
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.The Incident and Its Implications
The error occurred in an April 30, 2025 declaration from Anthropic data scientist Olivia Chen. Dukanovic revealed that after locating a supporting source via Google search, she used Claude to generate a formatted legal citation. Unfortunately, while Claude provided the correct publication title, year, and link, it also included an inaccurate title and incorrect authors
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.This incident has raised serious concerns about the use of AI in legal work. U.S. Magistrate Judge Susan van Keulen emphasized the gravity of the situation, stating there is "a world of difference between a missed citation and a hallucination generated by AI"
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.Broader Context of AI in Legal Proceedings
This is not an isolated incident. Recent months have seen several cases where attorneys have faced criticism or sanctions for submitting AI-generated errors in court filings:
- A California judge recently reprimanded two law firms for submitting "bogus AI-generated research"
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. - In January, an Australian lawyer was caught using ChatGPT in court document preparation, resulting in faulty citations
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. - A federal judge in Wyoming sanctioned attorneys from Morgan & Morgan for submitting multiple fictitious case citations generated by their in-house AI tool
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Industry Response and Future Implications
The incident has sparked discussions about the responsible use of AI in legal work. Some experts argue that fines may not be sufficient, suggesting that lawyers who misuse AI should face personal disciplinary action
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.In response to this error, Latham & Watkins has implemented additional review procedures to prevent similar occurrences in the future
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. This incident serves as a cautionary tale for the legal industry, highlighting the need for rigorous verification of AI-generated content.The Ongoing Copyright Dispute
This citation error is part of a larger legal battle between Anthropic and music publishers Universal Music Group, Concord, and ABKCO. The lawsuit, one of several high-stakes disputes between copyright owners and tech companies, centers on the alleged misuse of song lyrics to train AI systems like Claude
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.As AI continues to play an increasingly significant role in various industries, including law, this incident underscores the importance of maintaining human oversight and responsibility in the use of AI tools. It also raises questions about the potential need for new guidelines or regulations governing the use of AI in legal proceedings.
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