Suspension
$10K
ChatGPT
2026-07-17
A Toronto lawyer was suspended for six months for using ChatGPT to prepare a factum with AI-hallucinated citations and arguments in a family law matter, and for repeatedly lying to the court and the Law Society of Ontario about her AI use.
Law Society of Ontario v Lee · Mary Hyun-Sook Lee (also known as Jisuh Lee) · Law Society of Ontario Tribunal · ON
“While we are concerned by the lawyer’s reckless reliance on the non-existent cases produced by AI, we are extremely troubled by the lawyer’s subsequent repeated lies to the court and to the law society, which are serious integrity failures.”
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The file →
- Mary Hyun-Sook Lee, also known as Jisuh Lee, was sanctioned by the Law Society Tribunal.
- She used ChatGPT to create a factum with AI-hallucinated case citations and arguments, and then lied about using AI to the Ontario Superior Court of Justice and the LSO.
- She received a six-month license suspension and was ordered to pay the Law Society of Ontario $10,000.
- The Law Society Tribunal in Ontario handled the case, and contempt of court proceedings were referred to Ontario’s attorney general by Justice Frederick Myers.
- The sanction order was issued on 2026-07-16, and the tribunal noted her lies to the court and LSO were "serious integrity failures" despite her claims of being unfamiliar with ChatGPT.