The Law Society of Ontario has suspended a lawyer for six months after a judge exposed her use of AI-generated, non-existent legal precedents during a family and estate law hearing.The case marks the first time a Canadian law society has taken such action against a lawyer for abusing artificial intelligence in court.

Mary Hyun-Sook Lee, who operates as Jisuh Lee, was found to have submitted fabricated case law and misled the court, leading to her suspension and a $10,000 penalty.

The incident occurred during a 2025 hearing where Judge Fred Myers identified the AI-generated material as 'hallucinated precedents' and 'farcical misreadings' of real cases.

Lee failed to provide verifiable sources for the cases she cited, prompting the judge to look them up online and find they did not exist or were irrelevant.The tribunal ordered Lee to follow remedial guidelines and pay costs, while the matter of civil contempt remains unresolved due to procedural issues.

This case highlights the growing ethical concerns around AI use in legal practice and the potential consequences of misusing such technology in court.