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Provincia del Chubut v. PRA

Court
Chubut
Jurisdiction
Argentina
Decided
2025-10-15
AI tool
Implied
Outcome
Judgment annuled, new trial before different judge ordered
Monetary penalty
None reported

What was hallucinated

Misrepresented: Other | The trial judge's written decision contained the phrase 'Aquí tienes el punto IV reeditado, sin citas y listo para copiar y pegar:', indicating use of a generative AI to re-edit Point IV; the panel found omission of citations and lack of disclosure/traceability of the AI prompt and inputs.

Details

(Not an hallucination per se, but worth adding to the database anyway.)

Sanction teardown · Chubut, Argentina · 2025-10-15

Provincia del Chubut v. PRA

What happened

In Chubut, Argentina, a filing relied on an unnamed/unconfirmed AI tool to help draft legal argument. The court identified the following problems with the citations in that filing:

  • Misrepresented (Other)
    The trial judge's written decision contained the phrase 'Aquí tienes el punto IV reeditado, sin citas y listo para copiar y pegar:', indicating use of a generative AI to re-edit Point IV; the panel found omission of citations and lack of disclosure/traceability of the AI prompt and inputs.

Which AI tool

an unnamed/unconfirmed AI tool. Note: Charlotin's public database records tool attribution only where a court order, brief, or reporting on the matter states it explicitly; "unidentified" or "implied" means the record indicates AI use but does not name a specific product — we do not guess.

Outcome

Judgment annuled, new trial before different judge ordered

Additional detail

(Not an hallucination per se, but worth adding to the database anyway.)

How Citation Safe would have caught this

Citation Safe runs three deterministic layers before a brief is filed: (1) does the citation exist against CourtListener's database of published opinions, (2) if quoted, does that exact language appear in the source, (3) does the cited case actually support the proposition it is cited for. Fabricated case citations fail Layer 1. Fabricated or misattributed quotations fail Layer 2 even when the underlying case is real. Misrepresented holdings — a real case cited for a proposition it does not support — are the target of Layer 3. None of these checks involve asking another language model whether the citation looks right; they are lookups and text-matches against the actual source, which is why a hallucinated citation has to survive a direct lookup against the authoritative source — not another model's opinion — to earn a VERIFIED stamp; our measured false-verify rate is published live at /quality.

Check a brief before you file it → · See our live false-verify rate

Source: https://www.damiencharlotin.com/documents/882/wp-1760559941807.pdf, via Damien Charlotin's public AI Hallucination Cases Database (CC0).

Source: https://www.damiencharlotin.com/documents/882/wp-1760559941807.pdf

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