Incident Tracker

Legal AI incidents · Brazil

3 verified incidents · as of 2026-09-04

2026-08-13Fine
Apelacao Civel 1032884-04.2025.8.26.0224 (TJSP, 36a Camara de Direito Privado)
The Tribunal de Justica de Sao Paulo, deciding a defective-car consumer appeal, found the plaintiff's lawyer had used AI without critical review to cite fabricated precedents. Treating this as bad-faith litigation, it imposed a fine of 2 percent of the value of the claim and sent the ruling to the Sao Paulo and Federal bar councils.
2026-07-22Dismissal
Apelacao Civel 0035599-44.2017.8.16.0014 (TJPR)
A judge of the Tribunal de Justica do Parana in Brazil refused to hear a consumer appeal whose brief relied on what the decision called creative jurisprudence produced by AI, including an unlocatable Santa Catarina precedent and an unverifiable headnote. The appeal was not admitted for lack of dialecticity and the state bar was notified for professional measures.
2025-09-08Sanctions
Processo nº 1001467-35.2024.5.02.0467 (TRT-2, 4ª Turma)
In Brazil, the TRT-2 labour appeals court in São Paulo sanctioned a worker's lawyer for bad-faith litigation after an appeal cited AI-fabricated jurisprudence falsely attributed to Superior Labour Court ministers and a non-existent judge. The court imposed a 5% penalty on the claim value, holding counsel — not the AI — responsible for verifying citations.