Claude generated "an inaccurate title and incorrect authors" in a legal citation, per a court filing. The AI was used to help draft a citation in an expert report for Anthropic's copyright lawsuit.

Donald Trump’s former lawyer and fixer, Michael Cohen, accidentally gave his lawyer phony legal citations — which were then used in a motion given to a federal judge — conjured by Google’s artificial ...

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 ...

"Judge Matthewman’s opinion provides a primer on the use of AI for legal research and discusses the possible repercussions for submitting 'hallucinated,' nonexistent case law in a legal pleading," ...

A federal judge in Kansas may sanction lawyers who used AI to generate defective legal citations. The AI-generated brief included a nonexistent lawsuit, fake quotes and misrepresented case holdings.

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