The National Party president is alleged to have brokered a confidentiality agreement with a woman who claimed she'd been harassed by former National Party MP Jami-Lee Ross.
The Herald has been told the deal was done sometime in the last two years.
Concerns have emerged that the party required the woman who complained about Ross' alleged harassment and bullying behaviour to sign a confidentiality agreement after she raised concerns with party bosses.
A source has told the Herald the deal was brokered by party president Peter Goodfellow.
The Herald put questions to the National Party tonight. A spokesman responded that Goodfellow had nothing further to add to a statement he issued earlier today, in which he said: "Any issues that we were aware of that were raised, were dealt with at the time. We have nothing further to add at this time."