He also won a landmark case over parliamentary privilege. He had been sued by a plaintiff wishing to gain discovery of his constituency files. O'Chee refused to hand over the files, on the basis that they contained confidential information given to him by persons who wished to remain anonymous. He was ordered to produce the files, but appealed to the Court of Appeal of Queensland, which held that communications between a parliamentarian and constituents were covered under parliamentary privilege and, as such, were entitled to confidentiality. The case thus set an important precedent, expanding the scope of parliamentary privilege.