The acting Electoral Commissioner in Bougainville, George Manu, says he is satisfied with the way the recent election has been conducted.
He says aggrieved candidates can take any concerns to court but he stands by the process used.
There have been complaints from disgruntled candidates, including Sam Kauona, who came third in the presidential race.
Mr Kauona has alleged ballot tampering but Mr Manu dismisses this.
He says it would have been impossible.
"I think every losing candidate has the right to say anything that they see. I, as the head of the election process, I am satisfied with the whole process. I believe we have delivered the election successfully."
George Manu says any interference with the ballots would have been not iced by the scrutineers and international observers watching the vote count.