John Banks may have to give evidence under oath about his involvement in the Kim Dotcom election donation saga.
The Act MP has been summoned to appear in court next month after a judge found there could be enough evidence to allow a private prosecution over allegations he filed a false electoral return for his 2010 Auckland mayoral campaign.
Police investigated whether Banks knowingly declared two donations from internet tycoon Kim Doctom as anonymous, and found there was insufficient evidence to prosecute.
But Banks may still have a case to answer after retired accountant and political activist Graham McCready brought a rare private prosecution against him.
McCready's submission relies in part on sworn statements to police, released after the investigation, including Dotcom's insistence that Banks asked him to split a donation in two so it could be declared as anonymous.