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Nº 1001467-35.2024.5.02.0467 (ROT)

Court
Labour Court 2nd District
Jurisdiction
Brazil
Decided
2025-09-08
AI tool
Unidentified
Outcome
Monetary Fine
Monetary penalty
1 BRL

What was hallucinated

Fabricated: Case Law | Appellant inserted invented ementas (summaries of rulings) in the appellate brief that the court could not locate in official databases. || Fabricated: Case Law | An invented judgment attributed to a named individual who is not listed as a magistrate of the TRT da 3.ª Região. || Fabricated: Case Law | False attributions of decisions to Ministers of the TST purportedly supporting the appellant's arguments.

Sanction teardown · Labour Court 2nd District, Brazil · 2025-09-08

Nº 1001467-35.2024.5.02.0467 (ROT)

What happened

In Labour Court 2nd District, Brazil, 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:

  • Fabricated (Case Law)
    Appellant inserted invented ementas (summaries of rulings) in the appellate brief that the court could not locate in official databases.
  • Fabricated (Case Law)
    An invented judgment attributed to a named individual who is not listed as a magistrate of the TRT da 3.ª Região.
  • Fabricated (Case Law)
    False attributions of decisions to Ministers of the TST purportedly supporting the appellant's arguments.

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

Monetary Fine (monetary penalty: 1 BRL.)

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/2863/117A8F97FE8DD8_acordao2IA.pdf, via Damien Charlotin's public AI Hallucination Cases Database (CC0).

Source: https://www.damiencharlotin.com/documents/2863/117A8F97FE8DD8_acordao2IA.pdf

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