Attorney AI use
Mata v. Avianca, Inc.
The landmark sanctions decision involved invented cases and quotations, followed by submission of fabricated “opinions” when the court asked questions.
$5,000 joint sanction01
Case background
Material facts
Counsel filed a brief built on ChatGPT-created authorities and quotations. When challenged, the lawyers supplied supposed copies of opinions that the chatbot had also fabricated.
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The decision
The court’s ruling
The court imposed a $5,000 joint and several sanction on two lawyers and their firm and required notice to the client and judges falsely identified as authors of the invented decisions.
Why it matters
What the decision means
Mata v. Avianca established the basic rule: fluent AI output does not establish accuracy. Failure to read the primary source, followed by submission of fabricated opinions, turned a verification failure into misconduct.
Primary reading