Field, who has been given leave by the Supreme Court to appeal his conviction, said he had done what all New Zealanders did - pay tradesmen what they told him to pay, Maori Television's Native Affairs programme reported.
"I was a very busy politician and because of the language problems I should have been more attentive to those people and what they did in terms of the minor, not major, jobs that we asked them to do," he said.
"Most New Zealanders don't stand around and look at a tradesman doing his job, they just pay what they're told to pay. I should have insisted on invoices and that sort of thing but these people had a language problem, they can't read that sort of thing, can't write."