What is the most important AI case for lawyers?

Mata v. Avianca (S.D.N.Y. 2023) is the landmark case that put AI hallucinations in legal practice on the map. It triggered a nationwide wave of judicial standing orders requiring AI disclosure and verification. Every subsequent AI sanctions case references it.

Can lawyers be sanctioned for using AI?

Yes. Sanctions for AI misuse in legal practice range from monetary fines ($2,000-$15,000), to license suspension (People v. Crabill), to case disqualification (Johnson v. Dunn), to bar referral (Park v. Kim). The issue is not using AI - it is failing to verify AI output before filing.

Can AI be listed as an inventor or author?

No. Both U.S. courts (Thaler v. Vidal for patents, Thaler v. Perlmutter for copyright) and the UK Supreme Court have ruled that only natural persons can be inventors or authors. AI-generated works without human creative input cannot receive patent or copyright protection.

AI Case Law for Lawyers (2026)

AI case law is being written in real time. Every month brings new sanctions for hallucinated citations, new rulings on AI copyright, and new guidance on how attorneys should use AI tools. This guide tracks the cases that matter — the ones setting precedent, the ones attorneys are getting sanctioned over, and the ones that will determine the future of AI in legal practice.

Current copyright and evidence routes

Source-linked guides for distinguishing training, outputs and evidence questions as the case law develops.

Watermark and authorship evidence

Timeline

2012

Da Silva Moore v. Publicis Groupe

2018

Naruto v. Slater

2022

Thaler v. Vidal · Doe v. GitHub, Inc.

2023

Mata v. Avianca, Inc. · People v. Crabill · Thaler v. Perlmutter · Thaler v. Comptroller-General of Patents, Designs and Trademarks · The New York Times Co. v. Microsoft Corp. (OpenAI) · Andersen v. Stability AI Ltd. · In re Judge Brantley Starr AI Standing Order · FTC Investigation of OpenAI (ChatGPT Privacy Probe)

2024

Park v. Kim: AI Case Analysis · Gauthier v. Goodyear Tire & Rubber Co. · Garante per la Protezione dei Dati Personali v. OpenAI (Italian DPA v. OpenAI)

2025

Wadsworth v. Walmart Inc. · Mid Central Operating Engineers Health & Welfare Fund v. HoosierVac LLC · Johnson v. Dunn · Noland v. Land of the Free, L.P. · Thomson Reuters Enterprise Centre GmbH v. Ross Intelligence Inc. · Walters v. OpenAI, L.L.C. · FTC v. DoNotPay, Inc.

2026

Morgan v. V2X, Inc.

Governance, procurement & safeguards

xAI v OpenAI Lawsuit 2026: Trade Secret Status and Legal Risk

AI Case Law for Lawyers (2026)

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Current copyright and evidence routes

Timeline

AI Disclosure

AI Hallucination / Sanctions

AI Inventorship / Authorship

AI Liability / Consumer Protection

AI Liability / Copyright

AI Liability / Defamation

AI Privacy / Confidentiality

AI in Discovery

New Cases & Developments

Governance, procurement & safeguards

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