A California appeals court imposed a $10,000 sanction for fabricated AI citations in briefs
A California Court of Appeal found that nearly all of the legal quotations in an appellant's opening brief were fabricated by generative AI, attributed to cases that did not contain them or did not exist. The court imposed a $10,000 sanction and published the opinion as a warning to the bar.
Nearly all of the legal quotations in the opening brief were fabricated; the attorney did not read the cases the AI cited.
Key facts
- What
- A California Court of Appeal found that nearly all of the legal quotations in an appellant's opening brief were fabricated by generative AI, attributed to cases that did not contain them or did not exist.
- Incident date
- Sep 12, 2025
- Who
- Plaintiff's counsel in Noland v. Land of the Free
- Failure mode
- Hallucination
- AI surface
- Chatbot
- Severity
- Medium
What happened
In September 2025 California's Second District Court of Appeal published an opinion in Noland v. Land of the Free finding that most of the quotations in the appellant's briefs were fabricated by AI tools the attorney used, including quotes that appear nowhere and cases that do not exist. The court imposed a $10,000 sanction payable to the court, the first published California opinion on the issue.
What broke inside the model
- 01 · TriggerA user asks for a fact, a citation, or a figure.
- 02 · Model stepThe model writes a fluent, confident answer.
- 03 · Control gapNothing ties the claim back to a real source.
- 04 · FailureA fabricated fact ships as if it were verified.
- 05 · ConsequenceThe false claim reaches a customer, a court, or the public.
Confidence holds, and even spikes, as the claim detaches from any source.
The system produced fluent, confident output with no grounding in any source. Hallucination is a property of how the model generates, not a bug in one prompt: the most likely next token is not the same as the true one, and nothing in the pipeline compared the answer against a source of truth before it shipped.
What it cost
$10,000 sanction
Sources
- Press$10,000 Sanction Imposed Based on Fake Quotes in Briefs (Metropolitan News-Enterprise)metnews.com
- Court FilingNoland v. Land of the Free, L.P., Court of Appeal opinion (B331918)lawnext.com
Cite this entry
https://failureindex.ai/failures/california-appeals-court-imposed-10-000AI Failure Index. "A California appeals court imposed a $10,000 sanction for fabricated AI citations in briefs" (FI-0034). Realm Labs. https://failureindex.ai/failures/california-appeals-court-imposed-10-000 (indexed Jun 3, 2026).Data fields CC-BY 4.0, prose citation permitted. Incident ID FI-0034. Full dataset at /data.
Note from Realm Labs, the Index steward
How Realm would have caught this
- Prism
- OmniGuard
- AI Detection & Response (AIDR)
A runtime layer that watches the model's internal state can flag the moment a model commits to a claim it has no support for, and hold or reroute the response before it reaches a user. Realm reads those signals in real time rather than grading the transcript after the fact.