Massachusetts attorney sanctioned for citing AI generated fictitious cases
In a Massachusetts Superior Court case, a lawyer faced sanctions for submitting pleadings containing fictitious AI-generated citations; the ruling underscored the duty to verify AI-generated content before filing.
AI-generated fictitious citations used in court filings.
Key facts
- What
- In a Massachusetts Superior Court case, a lawyer faced sanctions for submitting pleadings containing fictitious AI-generated citations; the ruling underscored the duty to verify AI-generated content before filing.
- Incident date
- Feb 12, 2024
- Who
- Unnamed Massachusetts attorney
- Failure mode
- Hallucination
- AI surface
- Chatbot
- Severity
- Medium
What happened
A Massachusetts attorney filed three separate pleadings in the case Smith v. Farwell that contained fictitious case citations produced by an AI tool. The court discovered the fake citations during its review of the filings, prompting a sanctions hearing. The attorney was sanctioned $2,000 for failing to exercise due diligence and verify the accuracy of the AI-generated content before submission.
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 generative AI system hallucinated plausible-sounding but non-existent legal citations. This failure was exacerbated by a lack of human-in-the-loop verification, as the lead attorney reviewed the documents only for style and grammar rather than factual accuracy.
What it cost
Sources
Cite this entry
https://failureindex.ai/failures/massachusetts-attorney-sanctioned-citing-generated-fictAI Failure Index. "Massachusetts attorney sanctioned for citing AI generated fictitious cases" (FI-0210). Realm Labs. https://failureindex.ai/failures/massachusetts-attorney-sanctioned-citing-generated-fict (indexed Jun 5, 2026).Data fields CC-BY 4.0, prose citation permitted. Incident ID FI-0210. 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.