Federal Judge Sanctions Lawyer for Citing AI-Generated Hallucinations

A magistrate judge sanctioned an attorney for submitting AI-generated, hallucinated citations in a legal filing.

In Jimenez-Fogarty v. Fogarty, Magistrate Judge Gabriel W. Gorenstein sanctioned attorney Tricia S. Lindsay for submitting legal briefs containing fabricated citations. The judge explicitly described these as AI 'hallucinations,' marking a significant moment in judicial recognition of risks tied to legal tech.

• The court found that multiple citations in Lindsay's filings were fictitious and likely generated by artificial intelligence, though the specific AI tool was not disclosed.
• "The most basic questions—most obviously: what was the source of the fabricated citations?—are never answered," Judge Gorenstein noted, underscoring gaps in the attorney's explanation.
• Lindsay was fined $2,500 for the misleading filing, reflecting the seriousness with which the court viewed the integrity risk posed by AI hallucinations.

This ruling sends a clear message that attorneys must exercise heightened diligence when incorporating AI-generated content into legal submissions. The court emphasized that lawyers are responsible for verifying information produced by AI—failure to do so can result in sanctions and damage to professional reputation.

The incident amplifies mounting concerns within the legal profession about overreliance on AI tools, especially without sufficient governance or review protocols. As courts face a rise in AI-assisted practice, the Jimenez-Fogarty decision sets a precedent likely to influence firm policies, compliance routines, and future judicial scrutiny.

• Read the order adopting report and recommendations and clerk's judgment for further details.

Yes, but: The exact AI system used to generate the hallucinations remains unidentified, and the court noted gaps in how citations were created.

What's next: Watch for more courts to issue guidelines or sanctions related to AI use in filings as adoption grows.