The Commission of Inquiry into Certain Matters Relating to Taxation, popularly known as the Winebox Inquiry, was an inquiry undertaken in New Zealand to investigate claims of corruption and incompetence in the Serious Fraud Office (SFO) and Inland Revenue Department (IRD).
The Commissioner was Sir Ronald Davison. The Commission concluded that there were no grounds supporting the allegations of fraud and corruption. The inquiry was characterized by extensive litigation, both during and afterwards and by an extremely high level of public interest. The Commission was established in September 1994 and reported nearly three years later in August 1997.