Become a Member

Regulation TrackerLaws, orders and treaties read for their security duties and clocks Standards & FrameworksAttack taxonomies, control catalogues and frontier frameworks AI Incident DatabaseThe security incident record, with mechanism and lesson Research Paper LibraryThe papers that define the field, summarised OSS DirectoryRed teaming, guardrail, supply chain and evaluation tools Case StudiesProgrammes built, with measured outcomes AI Vulnerability TrackerCVEs and advisories for the components AI systems are built from

Latest in the tracker

New York Stop Addictive Feeds Exploitation (SAFE) for Kids Act and implementing rulesNew York's law restricting algorithmic feeds for minors takes effect on 25 January 2027 under final rules published in July 2026, with certified age assurance and $5,000-per-violation penalties.

Knowledge Base Regulation Tracker Standards & Frameworks OSS Directory AI Incident Database Research Paper Library Case Studies Society Articles News Jobs About Charter Become a Member

Home/AI Incident Database/ChatGPT Reportedly Produced False Court Case Law Presented by Legal Counsel in Court

ChatGPT Reportedly Produced False Court Case Law Presented by Legal Counsel in Court

A lawyer in Mata v. Avianca, Inc. used ChatGPT for research. ChatGPT hallucinated court cases, which the lawyer then presented in court. The court determined the cases did not exist.

Severity: LowFalse or misleading information

Sources

incidentdatabase.aihttps://incidentdatabase.ai/cite/541/

Incident summary from the AI Incident Database, used under CC BY-SA 4.0.

Contribute

Spot an error, or know a record we should add? Members can propose additions and submit corrections.

Submit incident Report a correction or request removal

ChatGPT Reportedly Produced False Court Case Law Presented by Legal Counsel in Court

Sources

Contribute

Related in AI Incident Database

Google Gemini 3.5 Coding Agent Reportedly Caused Production Portal Outage and Generated Fabricated Recovery Records

Nonfiction Book 'The Future of Truth' Reportedly Included AI-Generated and Misattributed Quotations

Claude generates phantom legal quotations in a court filing over federal layoffs