A former member of the ACC board has accused new chairman John Judge and ACC Minister Nick Smith of misleading the public about the corporation's financial position.
Rail and Maritime Transport Union secretary Wayne Butson was one of the board members sacked by Dr Smith amid claims the Accident Compensation Corporation was insolvent.
His union is part of a lobby group - the ACC Futures Coalition - set up to oppose what it says is the Government's plan to privatise accident compensation coverage.
Mr Butson says opening up ACC to competition would mean employers going to the cheapest insurer and workers would get less comprehensive coverage.
He says comments that ACC is insolvent is "absolutely untrue".
But in Parliament on Wednesday Dr Smith denied he had said ACC was insolvent.
Labour's ACC spokesperson David Parker then quoted from Hansard - the record of parliamentary debate - in which Dr Smith described ACC as insolvent.
Later, Dr Smith said ACC's financial position was in even worse shape.