Apr 2025Puerto RicoUnidentified legal research tool (suspected)
In an antitrust lawsuit that the Puerto Rico Soccer League brought against FIFA, CONCACAF and Puerto Rican football officials, Chief U.S. District Judge Raúl Arias-Marxuach found dozens of inaccurate or nonexistent legal citations across four filings by the league's two attorneys. According to Law Commentary, he said the errors bore hallmarks of generative AI and found that the lawyers violated Rule 11 by failing to reasonably verify the authorities they cited. Lawyer Monthly reports that the sanctions were decided in April 2025 and that an order of 23 September 2025 set the penalty at $24,492.10, payable to FIFA and the other defendants. Both lawyers have denied using artificial intelligence. In an October 2026 filing FIFA asked the court to dismiss the league's remaining claim because the sanction had not been paid. The lawyers proposed paying $1,000 a month, cited financial difficulties and an injury one of them suffered in March 2026, and argued that dismissal would punish their client for penalties imposed on them personally. The court had not ruled on the dismissal request when these reports were published.
AI relation unknown Low reported severity Lawsuit Ongoing
AI involvement suspected · Causal attribution disputed · 3 sources, 2 underlying accounts · Added 13/10/2026
15 Dec 2025 to 1 Oct 2026CanadaUnidentified AI drafting tool
On 1 October 2026 the Quebec Court of Appeal ordered court costs against a self-represented appellant in a family-law contempt appeal as a sanction for appeal filings that, in the court's description, he had written with artificial intelligence and that contained two references to non-existent judgments and one inaccurate reference to a cited paragraph. The court held that AI may be used to draft appeal filings only if the litigant verifies the authorities, found that he had breached the Chief Justice's notice on AI use, and described his conduct as negligence rather than bad faith. It rejected the respondent's request for a separate $10,000 sanction and, for reasons unrelated to AI, reduced the contempt penalty imposed at first instance. The decision does not name the AI tool.
Core + contextual relations Low reported severity Regulatory Action
AI involvement supported · Causal attribution supported · 1 source · Added 12/10/2026
Apr 2025 to May 2025Event location unknownCoCounsel, Westlaw Precision and Gemini (reported)
In an order dated 5 May 2025 and filed on 6 May in Lacey v. State Farm (C.D. Cal.), a special master struck the claimant's supplemental briefs and denied the discovery relief she sought after her lawyers filed briefs built on unverified AI-generated legal research: about nine of 27 citations were wrong and at least two cited authorities did not exist. One lawyer's sworn declaration says the outline he circulated relied on generative AI features in CoCounsel, Westlaw Precision and Google Gemini, and that he could not tell whether particular errors came from his transcription or from a tool; co-counsel at the second firm say they used no AI tools and did not know AI had been used. The order makes the two firms jointly pay $31,100, states the client was not at fault and will not bear the awards, and imposes no penalty on individual lawyers.
Contextual tracker case Medium reported severity
AI involvement supported · Causal attribution supported · 1 source · Added 29/09/2026
2025Event location unknownUnidentified legal research tool
A Divisional Court judgment of 6 June 2025 ([2025] EWHC 1383 (Admin)) records that, in a commercial claim against a Qatari bank, correspondence and witness statements filed by the claimant and his solicitor relied on numerous authorities that a judicial assistant's schedule found to be fictitious or misquoted: 45 citations, 18 of which referred to cases that do not exist. The claimant's witness statement says the citations were generated using publicly available artificial intelligence tools, legal search engines and online sources. The solicitor's statement says he relied on the client's research without verifying it, that he had reported himself to the Solicitors Regulation Authority and that he had removed himself from all litigated matters. The court found a lamentable failure to check the material, accepted that the solicitor did not realise the citations were false, held that the threshold for contempt proceedings was not met, and said it would also refer him to the regulator. The judgment does not record any later disciplinary outcome.
AI relation unknown Medium reported severity
AI involvement supported · Causal attribution supported · 1 source · Added 29/09/2026
8 Oct 2025 to 2 Sept 2026IndiaUnidentified AI tool
On 8 October 2025 the Additional Commissioner of Customs in Surat imposed a penalty of ₹425,27,99,100 (about ₹425 crore) on a diamond trader under Section 114 of the Customs Act, 1962, for allegedly misdeclaring a consignment of natural diamonds as lab-grown diamonds to pay a lower tariff. The trader's challenge was dismissed by the Gujarat High Court on 20 January 2026. Before the Supreme Court the trader argued that judgments and articles cited in the penalty order had been generated using artificial intelligence. On 2 September 2026 a bench of Justices Dipankar Datta and Sheel Nagu, after checking the material, found that the order relied on case law that was non-existent or carried fake citations, and on real cases that did not lay down the propositions attributed to them, which the court said 'appears to be a hallucination of AI'. Holding that the use of AI and reliance on this dubious material was fatal to the order, the court set aside both the penalty order and the High Court's order without deciding the merits, sent the matter for fresh adjudication by a different officer of the same rank, and left any action against the order's author to the appointing authority. The AI tool used is not named in the read reports.
Contextual tracker case Medium reported severity Internal Action
AI involvement supported · Causal attribution supported · 4 sources, 1 underlying account · Added 29/09/2026