Toronto lawyer Mary Hyun-Sook (Jisuh) Lee has been suspended from practising for six months after citing fake cases generated by AI in a civil court matter and then lying by trying to blame her law student. The Law Society Tribunal suspended Lee on Thursday and ordered that she pay $10,000 in costs, in what may be the first decision by a legal regulator punishing a lawyer for misusing AI in court. The tribunal released brief reasons, stating Lee, called to the bar in 1995, failed to serve her client in a 2025 estates case by relying on materials “containing only non-existent or irrelevant case law” generated by AI, deliberately misled the court, and was dishonest with the Law Society during their investigation. The judge in the civil court matter ordered that Lee face a contempt of court hearing after flagging multiple problems with her written materials; following this, Lee appears to have again turned to ChatGPT for help on how to prepare for that hearing. A finding as to whether Lee is guilty of contempt of court has not been made, as those proceedings are ongoing.