Former National MP Jami-Lee Ross has arrived at Victoria Street Police Station in Wellington to file a complaint against leader Simon Bridges.

He told media outside Wellington Police Station this afternoon that he would release the recording publicly after he had given it to police.

In a brief statement, Jami-Lee says he would be happy to speak to the media after the police meeting.

In an extraordinary move yesterday, he quit the National Party over what he claims are corrupt practices by the National Party's leader.

Jami-Lee alleges he has a phone recording suggesting Simon had asked him to split a $100,000 donation from businessman Zhang Yikun into smaller parts, so it was below the threshold where it would have to be made public.

Yesterday, Simon responded to those claims saying they were "baseless, false but serious allegations".

Today, deputy leader Paula Bennett told Morning Report that Simon told her he did in fact meet with the businessman and the subject of supporting the party may have come up.

"[Mr Bridges] said he certainly had conversations with [Mr Zhang] and with others that have wanted to support the National Party."

However, she says she's hesitant to comment, because she didn't want to misrepresent anyone as this was based on another conversation and she was telling it third-hand.

"He certainly had dinner with him, he's trying to recall that dinner and all of the conversations, and then I think he's seen him at other functions, which Jami-Lee Ross has put photos out," says Paula,

"He certainly thinks that it may have come up that he had said I want to support the National Party, Simon knowing I think that Jami-Lee knows him probably did put him on to it," she says.

"We're trying to dig our way through all of this, it is very complex, we're not sure what Jami-Lee Ross has done, he's kind of woven this through, It's not straightforward. I am hesitant and now I don't want to misrepresent."

The Electoral Commission says it has not received any complaints relating to the matter, but would provide assistance to the police.

National Party $10k donor revealed

Meanwhile, the person responsible for a separate $10,000 secret donation to National has been revealed as former Auckland councillor Aaron Bhatnagar.

Among his allegations, Jami-Lee says Simon had knowingly filed a false election return which noted a donation from a group called the Cathedral Club.

That donation was later removed from Mr Bridges' return.

The National Party says it was transferred to the wider party, which is where it was supposed to go in the first place.

In a statement published online, Mr Bhatnagar has revealed he was responsible for the donation.

He says the Cathedral Club was an informal pay-your-own-way dinner club comprised of a small group of Young Nats and university friends.

He was a regular attendee and one of the organisers of the club dinners, the last of which was held in 2008, he says.

"These days, it's easier for me to donate to parties, causes and charities than it is to participate on committees and help in campaigns as I once did.

"So I'm happy to be noted as giving $10,000 to the National Party in 2017. In addition, I have supported candidates in National with lesser sized donations in the past."

In a statement, a spokesperson for the National Party says the party fully complied with the Electoral Act but had a long-standing policy of not discussing donations.

"Given the public interest in the Cathedral Club, however Aaron Bhatnagar has confirmed he is the donor," the statement reads.

"Simon and Aaron Bhatnagar are friends and Aaron is a well-known and strong supporter of the National Party.

"As the National Party has outlined, the donation was made to the National Party, not to Simon and the error was fixed as soon as it became known."