Tenerife lawyer fined for submitting 48 AI-generated fake legal citations
The Criminal Chamber of the Superior Court of Justice of the Canary Islands (TSJC) imposed a €420 fine on an unnamed Tenerife lawyer after finding that an appeal contained up to 48 fabricated judicial citations generated by a general-purpose AI tool. The court found the lawyer did not verify the citations against official jurisprudence databases and forwarded the matter to the lawyer's Bar Association for potential disciplinary action.
A general-purpose AI chatbot hallucinated plausible-looking but nonexistent legal citations that were filed without human verification.
Key facts
- What
- The Criminal Chamber of the Superior Court of Justice of the Canary Islands (TSJC) imposed a €420 fine on an unnamed Tenerife lawyer after finding that an appeal contained up to 48 fabricated judicial citations generated by a general-purpose AI tool.
- Incident date
- Jan 1, 2026
- Who
- Unnamed Tenerife lawyer
- Failure mode
- Hallucination
- AI surface
- Chatbot
- Severity
- Medium
What happened
The TSJC determined that an appeal against a Provincial Court ruling included up to 48 fake citations to Supreme Court rulings and a General Council of the Judiciary report that did not exist. The court found these references were produced by a general-purpose AI chatbot and submitted without any verification of case numbers, dates, or identifiers. The TSJC imposed a €420 fine and transmitted the decision and background to the relevant Bar Association for further disciplinary consideration.
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.
A generative AI chatbot produced plausible but fabricated legal citations (a classic hallucination). The lawyer relied on the tool's outputs without performing basic human verification against official jurisprudence databases (e.g., CENDOJ), so the fabricated citations were submitted to the court. The failure combined AI hallucination with an absence of required professional diligence and human oversight.
What it cost
Sources
- PrimaryEl TSJ de Canarias multa a un abogado por citar hasta 48 sentencias falsas sugeridas por IApoderjudicial.es
- PressLawyer who cited non-existent sentences made by Artificial Intelligence is ordered to pay a finelavozdelanzarote.com
Cite this entry
https://failureindex.ai/failures/tenerife-lawyer-fined-submitting-generated-fakeAI Failure Index. "Tenerife lawyer fined for submitting 48 AI-generated fake legal citations" (FI-0386). Realm Labs. https://failureindex.ai/failures/tenerife-lawyer-fined-submitting-generated-fake (indexed Jun 9, 2026).Data fields CC-BY 4.0, prose citation permitted. Incident ID FI-0386. 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.