Lawyers sanctioned after ChatGPT fabricated six fake case citations in Mata v. Avianca
At a Glance
- Significant disruption. Hours of lost work, reputational embarrassment, or measurable financial impact under $10k.
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What Happened
In a personal-injury suit against Avianca, attorney Steven Schwartz used ChatGPT for research and submitted a brief citing six judicial decisions that did not exist — ChatGPT invented them and even 'confirmed' they were real when asked. U.S. District Judge Castel sanctioned Schwartz and co-counsel Peter LoDuca $5,000 and required corrective letters. It became the landmark cautionary tale about AI hallucination in legal filings.
Case Analysis
Verified Facts
- The brief cited six nonexistent cases generated by ChatGPT
- ChatGPT 'confirmed' the fake cases when asked
- Judge Castel imposed a $5,000 sanction in June 2023
Operational Lessons
- Always verify AI-provided citations against primary sources
- LLMs assert fabricated facts with confidence
Primary Source
Mata v. Avianca, Inc. (Wikipedia)en.wikipedia.org ↗Case Record
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