An attorney who submits filings containing fabricated or unsupported legal authority—including hallucinated citations generated by artificial intelligence—violates the duty of reasonable inquiry under MCR 1.109(E)(5), and such conduct on appeal supports sanctions under MCR 7.216(C)(1).

An attorney who uses AI software to draft appellate briefs and files them without properly verifying the cited legal authorities violates ethical duties of competence and candor.