The public AI Hallucination Cases database (maintained by Damien Charlotin, HEC Paris research fellow) hit 1,598 documented court cases involving AI-fabricated citations or content by June 9, 2026 — up from ~200 in mid-2025, 719 in January 2026 and 1,227 in early April; the count is growing at nearly 8 new cases per day. In Withers v. City of Aberdeen (N.D. Mississippi, June 8, 2026), both sides filed fake citations — the judge canceled the trial and suspended the two lead attorneys from the district for two years.
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Expert: Damien Charlotin, HEC Paris Research Fellow, maintainer of the AI Hallucination Cases database The AI output in these filings is not a minor formatting slip — fabricated citations are false statements of law presented to a court. Charlotin's database documents 1,598 court cases involving AI-fabricated citations or content as of June 9, 2026, and the count grows at nearly 8 new cases per day. The sanction trajectory has escalated from fines (Mata v. Avianca, $5,000, 2023) to fee awards, revoked admissions, suspensions, and a canceled trial: in Withers v. City of Aberdeen (N.D. Mississippi, June 8, 2026), both sides filed fake citations and the judge suspended the two lead attorneys for two years. The record penalty reached approximately $109,700 in Couvrette v. Wisnovsky (D. Oregon). Stanford RegLab's peer-reviewed study found even paid legal research tools hallucinate 17-34% of the time. Because the database only counts cases where a court explicitly found reliance on hallucinated material, 1,598 is a floor — the true figure is higher. Source: https://www.haqq.ai/blog/ai-legal-hallucination-audit
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