California New AI Law Puts Lawyers Under Tough Disclosure Rules

California New AI Law Puts Lawyers Under Tough Disclosure Rules

New requirements on AI use are forcing law firms to decide when tech-assisted research and drafting must be disclosed.

AuthorStaff WriterOct 3, 2026, 10:17 AM

 

California’s first-in-the-nation law regulating attorneys’ use of generative artificial intelligence gives law firms the thorny task of determining when their use of the increasingly ubiquitous technology requires disclosure.

 

The law, which takes effect on January 1, requires attorneys to disclose when they have used generative AI to create any document filed with the courts. Deciding how to meet the standard is easier said than done, given that AI is woven into several technology platforms used by law firms.

 

“The question every firm will be working through before January is what counts as using AI,” said Scott Meyers, chairman of law firm Akerman LLP. “It’s built into the research and drafting tools lawyers use every day.”

 

The disclosure requirement shows that addressing lawyer AI flaws, such as hallucinated case citations, comes with its own set of challenges. Firms expect to work through those difficulties, pointing to strengthened internal controls that they say will help ensure compliance with the California law.

 

“For most large law firms, the law is not going to change how we use AI,” said Daren Orzechowski, the Silicon Valley-based partner and global co-head of technology practice at A&O Shearman. The California statute “largely captures what lawyers should already be doing”, he said.

 

The SB 574 legislation, signed into law by Governor Gavin Newsom on September 30, responds to a wave of AI hallucinations and fake or garbled case citations that have appeared in court filings nationwide. A California appeals court in March sanctioned counsel $5,000 for fictitious AI-generated citations in a custody dispute.

 

The law requires lawyers to verify every citation before filing and at least one attorney to sign each filing in their own name. It also bans lawyers from putting confidential client information into public AI tools and authorises courts to sanction violations.

 

Similarly, arbitrators cannot hand decisions over to AI under the new law and must tell the parties when they rely on AI-generated information.

 

While other states have addressed AI through courts and bar regulators, California is the first to put such rules into statute — a distinction that Meyers said matters.

 

“An ABA opinion is guidance, and SB 574 is law,” he said. While most of what California’s law asks of lawyers was already covered by ethics guidance, Meyers said, “the new duty is disclosure”.

 

The disclosure rule applies to all documents submitted to the court and has no exception for minor uses, said Peter Salib, an assistant law professor at the University of Houston Law Center. “A firm that uses AI to research, draft, or even edit a brief will need a standard disclosure and a way to track which filings AI touched,” he said.

 

Daniel W. Linna Jr., director of law and technology initiatives at Northwestern Pritzker School of Law and the McCormick School of Engineering, said the disclosure rule “is of little purpose, is burdensome, overbroad, and will chill lawyer use of AI”. He said lawyers should challenge the standard on First Amendment grounds.

 

The requirement that the attorney responsible for a filing personally verify citations, even those not generated by AI, “imposes quite an onerous burden on the attorney signing each document”, said Ariel House, a partner at Baker Botts who has written client alerts on the legislation.

 

Firms often have paralegals, who bill at lower rates than attorneys, check every case, quote and exhibit reference in a filing under a lawyer’s supervision, House said. The requirement for an attorney’s personal verification “takes time, and that burden could be especially significant for solo practitioners and small firms”, she said.

 

The law’s restrictions on handing legal work to AI could also become challenging for law firms, Meyers said, “because legal AI is moving from drafting documents to taking actions on a lawyer’s behalf”. Akerman designs its agentic tools so that a lawyer reviews the work and makes the final decision, he said.

 

“The biggest difference will be for lawyers who were outsourcing their judgment to AI,” Meyers said.

 

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