AI incident
Lawyer filed AI-hallucinated case citations
Law firm (Mata v. Avianca) · 2023
Organisation
Law firm (Mata v. Avianca)
Year
2023
Failure mode
Hallucination
Severity
major
Domain
Justice & democratic processes
Source
SDNY sanctions, 2023
What happened
An LLM fabricated court cases that were filed and led to sanctions.
What would have prevented it
Grounding with citations + mandatory human verification
Requirements this maps to
Editorial cross-reference from our prevention note — it is not a finding that any law was breached.