US
US | Incident Report Hallucination
2026-01-16

Connecticut sanctions motion alleges AI-hallucinated citations in court filings

AI Model: Unspecified generative AI tool

I. Executive Summary

In a Connecticut Superior Court case in Danbury, plaintiff’s counsel sought sanctions alleging that defense counsel filed motions containing fabricated and misquoted case law linked to AI-assisted drafting/research. The motion requests reimbursement of time spent addressing the alleged false authorities and other relief. The defense counsel reportedly acknowledged using research software with an AI component and withdrew/refiled at least one challenged filing, but the sanctions motion alleges additional inaccuracies persisted.

II. Key Facts

  • Motion for sanctions dated and filed January 16, 2026, in Connecticut Superior Court (Danbury).• Plaintiff counsel alleged at least 12 misrepresentations in one motion to strike, including non-existent cases and quotations not found in cited decisions.• Plaintiff counsel’s firm reportedly notified defense counsel of suspected AI-generated fabrications by email (Nov. 3, 2025).• Defense counsel reportedly responded that their research software includes an AI component, denied intent to mislead, and withdrew/refiled a motion.• The sanctions motion alleges the subsequent motion also contained fabricated material, including a repeated allegedly fabricated quote.

III. Regulatory & Ethical Implications

Reinforces that AI-assisted legal research/drafting does not reduce counsel’s duty of candor and reasonable inquiry; a sanctions motion framed as “fraud on the court” risk can accelerate local rulemaking (e.g., certification/verification requirements) and increase cost-shifting exposure where opposing counsel must investigate and rebut hallucinated authorities.

IV. Media Coverage & Sources

No external sources linked.