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Regulation Tracker / Brazil

TJPR 9th Civil Chamber: 2% bad-faith fine and OAB referral for AI-fabricated STJ precedent

Court of Justice of Parana (Tribunal de Justica do Parana) · Parana

last revised 2026-06-30last verified 2026-09-041 versioncountry page →

Judgment (guidance)In forceVerification duty

map categories:Sanctions for AI misuseDuty to verify AI output

Unverified: we have not yet opened the official document at the linked address. The record is listed for completeness and excluded from search indexes until confirmed.

Representative of Brazil's sanctions line: the Parana Court of Justice fined a lawyer 2 per cent of the updated case value under article 81 of the Code of Civil Procedure for citing a non-existent STJ ruling fabricated by AI, and referred him to the Parana Bar, holding that AI support does not relieve the duty of rigorous verification.

Applies to
lawyers, parties
Effective
30 Jun 2026
Current version
Judgment (proc. 0108267-74.2025.8.16.0000) · 30 Jun 2026
Last verified
04 Sept 2026
Official text
www.tjpr.jus.br/noticias/-/asset_publisher/9jZB/content/tjpr-multa-adv…

What the document requires

  • Fine of 2 per cent of case value for bad-faith litigation (CPC arts 80-81).
  • Referral to OAB/PR for disciplinary investigation.
  • Use of AI does not remove the lawyer's verification duty.
  • Consistent with TJSC (Feb 2025), the Londrina federal court (Jul 2025) and TST (Mar 2026) decisions.

Version history

VersionDateWhat changedSource
Judgment (proc. 0108267-74.2025.8.16.0000)current2026-06-30Initial decision; reported by the court and by Migalhas.official

Sources

Cite this record

SafeLegalAI Legal AI Regulation Tracker, "TJPR 9th Civil Chamber: 2% bad-faith fine and OAB referral for AI-fabricated STJ precedent" (Court of Justice of Parana (Tribunal de Justica do Parana), Judgment (proc. 0108267-74.2025.8.16.0000), 2026-06-30), safelegalai.com/regulation/brazil/br-tjpr-9-camara-ai-citation-fine-2026 (accessed 2026-09-04). Data: CC BY 4.0.

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