
"In Puerto Rico, several firms-including Paul, Weiss, Rifkind, Wharton & Garrison and Sidley Austin-will share $24,492 in legal fees after the opposing counsel filed motions with at least 55 defective citations, report Reuters, Law360 and the Volokh Conspiracy. The solo practitioners who filed the motions had denied that the errors were caused by the use of AI, "but the sheer number of inaccurate or nonexistent citations suggests otherwise," said Chief U.S. District Judge Raúl Arias-Marxuach of the District of Puerto Rico in a Sept. 23 opinion."
"In California, a lawyer will have to pay $10,000 for including fake quotes and off-topic cases generated by AI in appellate briefs, report CalMatters and LawSites. The sanction will be paid to the court, the California Courts of Appeal's Second Appellate District said in a Sept. 12 opinion. The appeals court declined to award attorney fees to the opposing counsel because they did not detect the errors."
Judges are imposing fines on attorneys who include faulty or fabricated case citations likely generated by artificial intelligence. Sanctions often reimburse law firms that expended time addressing defective citations, though courts sometimes direct payment to the court itself. In Puerto Rico, multiple firms will share $24,492 after opposing counsel filed motions containing at least 55 defective citations, and judges found the number of inaccuracies suggested AI use. In California, an attorney must pay $10,000 for including fake quotes and off-topic cases in appellate briefs, with the appeals court declining to award opposing counsel fees because they did not detect the errors.
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