Fake AI Case Citations and Court Sanctions: Mata v. Avianca

Mata v. Avianca arose from a personal-injury action in federal court in the Southern District of New York. In a June 22, 2023 opinion and order, the court found that attorneys submitted nonexistent judicial opinions, fake quotations, and citations generated by ChatGPT in a filing. The court emphasized that using a reliable AI tool for assistance is not inherently improper, but lawyers must check their submissions. The respondents continued to stand by the fake authorities after questions were raised, which shaped the court’s findings and sanctions. The court imposed a $5,000 penalty jointly and severally on the respondents and ordered them to send the client and judges falsely identified as authors copies of the order and related materials. It also discussed Rule 11’s requirements and counsel’s gatekeeping role. The case is a specific sanctions order based on the record before that court; it does not create a blanket ban on generative AI or decide every question about permissible legal research tools. Before filing, verify that every case exists, is still good law, and supports the proposition attributed to it. Read the full opinion, confirm quotations and pincites, and check dates, jurisdiction, and subsequent treatment. AI-generated summaries or citations can sound plausible while being fabricated or distorted. If an error is found, investigate its scope, correct the filing through the applicable procedure, and communicate candidly with the court and affected parties. Existing professional and procedural duties continue to apply when AI is used.