Missouri Courts Implemented New Rules for AI Use

Missouri courts set strict verification requirements following instances of fabricated AI-generated case law.

Updated on Sept. 22, 2026 in Artificial Intelligence

Bold flat-color editorial illustration showing a metal plumb line and marble column, representing the need for verification in legal AI use. — Missouri courts have introduced mandatory verification standards for attorneys using AI, responding to recent submissions of fabricated legal precedents in state briefs. AI Illustration. Upload story photo >

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Missouri courts have implemented mandatory rules governing the use of artificial intelligence in legal proceedings. This action follows a 2024 incident where a brief submitted to the Missouri Court of Appeals contained fabricated case law and references.

Why it matters

The judiciary is responding to the emergence of generative AI, which can create non-existent legal precedents that threaten the integrity of the justice system. These rules mandate that attorneys verify all information before filing documents to ensure procedural compliance.

Missouri courts established strict verification requirements for documents after a 2024 case involving AI-generated fabrications. An attorney was issued a $10,000 fine for submitting a brief that included unverified and non-existent legal research.

The players

Missouri Court of Appeals

This is the intermediate appellate court in the state that enforces procedural rules for legal filings and maintains the integrity of case law.

The details

Attorneys increasingly utilize artificial intelligence to conduct legal research and draft briefs, yet the Missouri Court of Appeals determined that relying on such tools without verification violates procedural rules. The new standards aim to prevent the submission of fabricated arguments that can derail judicial efficiency.

A legal brief containing fabricated AI-generated content was filed in 2024.

The Tech Race

The implementation of Missouri's new AI verification rules follows the pattern established by the American Bar Association's Model Rules of Professional Conduct regarding technology. These measures represent a broader effort to adapt legacy legal frameworks to the capabilities of modern generative AI systems.

Attorneys practicing in the state must now implement more rigorous verification processes to avoid potential sanctions and fines. This change ensures that legal briefs filed in Missouri courts are held to higher standards of accuracy when using automated drafting tools.

The takeaway

Legal professionals should treat all AI-generated output as a starting point rather than a factual source to avoid serious professional consequences. Always independently verify every citation and legal precedent before submitting work to a court.