Mata v Avianca, Inc.
sanctions
The origin case of legal AI hallucination sanctions: two New York attorneys were fined $5,000 after citing six ChatGPT-invented cases in a personal-injury filing and persisting after the fabrications were questioned, prompting the first widely reported judicial rebuke of generative AI misuse by lawyers.
- Date of decision/order
- 2023-06-22
- Court
- US District Court, Southern District of New York
- Jurisdiction
- US-FEDERAL
- AI tool
- ChatGPT
- Conduct
- Attorneys filed an affirmation citing six non-existent judicial decisions generated by ChatGPT, then doubled down when challenged, submitting fabricated opinions.
- Consequence
- USD 5,000
Sources
Cite this incident
SafeLegalAI Global Legal AI Incident Tracker, "Mata v Avianca, Inc.", safelegalai.com/tracker/mata-v-avianca (accessed 2026-07-16). Data: CC BY 4.0.