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.

The authors state "New York judges drafting decisions and practitioners citing authority to New York courts should consider using the Official New York Law Reports citation style—known as the 'Tanbook ...

Anthropic has responded to allegations that it used an AI-fabricated source in its legal battle against music publishers, saying its Claude chatbot made an “honest citation mistake.” An erroneous ...

From Judge Judith Levy (E.D. Mich.) in Evans v. Robertson, the I've Seen Fake Cites on Both Sides Now case: The litigants in this case … have been repeatedly warned that factitious citations will not ...

From a federal district court opinion I was just reading, The Court strongly disfavors footnoted legal citations. Footnoted citations serve as an end-run around page limits and formatting requirements ...

Five attorneys who signed a legal brief that had fabricated citations hallucinated by AI may be sanctioned by a federal judge in Kansas.

California Attorney Fined $10k for Filing an Appeal With Fake Legal Citations Generated by AI A California attorney must pay a $10,000 fine for filing a state court appeal full of fake quotations ...