Giacomino y Otros v. Montserrat y Otros
Rosario CA · Aug 22, 2025
What happened in this matter?
In Giacomino y Otros v. Montserrat y Otros, the Rosario Civil and Commercial Court of Appeal considered appeals arising from a failed extrajudicial settlement in a damages action. The claimant’s lawyer had used two favorable authorities in an appellate response, but withdrew them after being asked to identify their source: the citations came from an AI system and could not be found. The court said even good-faith use of a generative chatbot did not excuse the lawyer’s duty to verify sources, noting that one supposed precedent was attributed to the same appellate chamber.…
- Why the court cared
- The court distinguished the merits of the settlement appeal from counsel’s citation lapse, but held that no client consent or good faith can relieve a lawyer of the duty to check the sources used to support legal arguments.
- Why it matters now
- The decision treats verification as a nondelegable professional duty, even where counsel says the erroneous AI output was used in good faith.
Why this matter is tracked
In Giacomino y Otros v. Montserrat y Otros, the Rosario Civil and Commercial Court of Appeal considered appeals arising from a failed extrajudicial settlement in a damages action. The claimant’s lawyer had used two favorable authorities in an appellate response, but withdrew them after being asked to identify their source: the citations came from an AI system and could not be found. The court said even good-faith use of a generative chatbot did not excuse the lawyer’s duty to verify sources, noting that one supposed precedent was attributed to the same appellate chamber. It rejected the appeal, imposed costs on the losing appellant, issued a warning to counsel, and notified the Rosario Bar Association so it could address the risk of unchecked AI-generated legal research.
Rosario CA referred counsel to the Bar for fabricating a precedent from the same court; same-court citations get verified first.
Record details
What the record establishes about AI use
The current record does not establish a specific AI tool. Do not infer AI use beyond the source.
Referral of the issue to the Bar
Correction behavior is not separately verified in the current record.
Tracked discrepancy record
1 citation, quotation, or authority issues are recorded in the source dataset.
- Fabricated: Case Law | Cited fabricated precedents, at least one of which was by the same court
Questions this record answers
- What happened in Giacomino y Otros v. Montserrat y Otros?
- In Giacomino y Otros v. Montserrat y Otros, the Rosario Civil and Commercial Court of Appeal considered appeals arising from a failed extrajudicial settlement in a damages action. The claimant’s lawyer had used two favorable authorities in an appellate response, but withdrew them after being asked to identify their source: the citations came from an AI system and could not be found. The court said even good-faith use of a generative chatbot did not excuse the lawyer’s duty to verify sources, noting that one supposed precedent was attributed to the same appellate chamber.…
- Why does Giacomino y Otros v. Montserrat y Otros matter for legal AI risk?
- The decision treats verification as a nondelegable professional duty, even where counsel says the erroneous AI output was used in good faith.
- What does the public record establish about Giacomino y Otros v. Montserrat y Otros?
- Spanish-language appellate decision. The court found and addressed unchecked AI-supplied citations; it issued a warning and Bar notification, not a separate disciplinary sanction in this judgment.
- Which source supports this Giacomino y Otros v. Montserrat y Otros summary?
- The recorded source is Damien Charlotin case archive. It is classified as publisher document archive; review the linked material and subsequent docket history before relying on this summary.
Related matters
Related by court, jurisdiction, tool, or classified failure pattern. Similarity does not imply the same facts or outcome.