Former Far North Mayor Wayne Brown is confident a Serious Fraud Office investigation of the district council will not turn up any evidence of impropriety against him.
However, Mr Brown said with the secrecy surrounding the investigation from the Far North District Council and the SFO it casts aspersions on all council staff and contractors.
The SFO has confirmed it is investigating the activities of the FNDC after an internal investigation by the council found matters of concern, but neither the SFO nor the council is commenting further on what aspects of the council's operations - or who - is being investigated.
Far North Mayor John Carter said the council is supporting the SFO investigation which came about after late last year, he and councillors commissioned an independent consultant to look into council activities. The outcome of the investigation was referred to the SFO.
He said the council is co-operating fully with the SFO.