Banks are under renewed scrutiny and have been told to provide proof they are behaving ethically. On Monday, the Financial Markets Authority and the Reserve Bank directed the leading banks to provide documentary proof that their practices are clean. The step comes after a royal commission in Australia revealed widespread poor practice by banks. The Bankers' Association represents New Zealand banks - it's chair is David McLean. He tells Guyon Espiner he doesn't think an inquiry is necessary in New Zealand. "Things will occasionally go wrong. There's no evidence of any systemic abuse. If people have a problem, contact the bank, if that doesn't work, contact the Ombudsman, contact the FMA," Mr McLean says.