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Incident Tracker

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.