Lawyer Sanctioned $6,000 for AI-Generated Fake Legal Citations

May 29, 2025, 3:02 PM UTC

A federal judge slapped a $6,000 sanction on an attorney who filed briefs that included citations to nonexistent cases that were generated using artificial intelligence.

The lawyer, who’s representing an Indiana excavation company in a dispute with a multiemployer benefit fund, admitting to using generative AI to draft briefs that included “hallucination cites” to fictitious cases. Judge James Patrick Hanlon imposed a $6,000 sanction on him for this conduct, explaining that this amount balances the need to deter reckless attorney conduct with mitigating factors like the attorney’s efforts to educate himself on responsible AI use and the harms he’s already ...

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