New Zealand First leader Winston Peters says it is an abuse of power for the Attorney-General to seek nearly $14,000 in court costs from the cameraman who taped a conversation between the Prime Minister and ACT's John Banks.
The cameraman, Bradley Ambrose, failed to get a court ruling on the legality of the cafe conversation he taped between the Mr Key and Mr Banks during the election campaign.
Mr Peters says the Attorney-General cannot claim the costs because the case does not involve the Government, just the National and ACT parties.
He says the lawyers for Mr Key and Mr Banks should have taken up the case but instead National is using public money to have a fight with a private citizen.
Mr Peters says Mr Ambrose should make a claim against Mr Key and Mr Banks.