Victorian Opposition Leader Matthew Guy has dismissed as "fake news" allegations he inappropriately attended a private meeting with developers in a penthouse.

Fairfax Media has reported that in 2013 as planning minister, Mr Guy was a guest at a small meeting with developers organised by his now-deputy, David Hodgett.

It was alleged the developers were asked to pay $10,000 into Mr Hodgett's electorate fundraising account, with an invoice asking for the payment to be listed as sponsorship of a forum.

On his way into Parliament, an angry Mr Guy told reporters he was sick of smears from the Labor Party "dirt unit".

"My side of politics is sick to death of the Australian Labor Party and The Age concocting stories out of nothing to make them into some sort of incredible scandal that is frankly completely and utterly untrue," he said.

"I'm sick to death of this, I'm sick to death of what is becoming fake news in the state of Victoria."

Mr Guy did not deny the meeting occurred but pointed to dozens of similar forums organised by the Labor Government for people to meet ministers.

He said it was not up to him to remember who had issued invoices because he had not arranged the meeting.

Developer wasn't 'buying influence': Hodgett

Mr Hodgett said there was no evidence he had done anything improper and rejected suggestions a developer was buying influence.

"I have done nothing wrong here, it's all in accordance with the law," he said.

"To slander me and not produce any evidence I think is wrong. There's no email suggesting you pay and we'll do this."

Mr Hodgett said there were seven people at the "industry forum", including himself, Mr Guy, two developers, lobbyist Stephen Kerr and staff.

He denied there was a conflict of interest in taking taxpayer-funded staff to a fundraiser, saying they were there to provide the highest levels of probity.

The money was declared through the Liberal Party and the Victorian Electoral Commission, he said.

Mr Hodgett said he did not go through the Liberal Party's fundraising arm Enterprise Business because politicians sometimes ran their own campaigns.

"Labor, Liberal, Greens, all MPs and candidates for that matter can raise funds," he said.

Guy has 'serious questions to answer': Labor

Police Minister Lisa Neville said there were incredibly serious questions for Mr Guy to answer.

She suggested Mr Guy should again refer himself to the corruption watchdog, as he did when details of his lobster dinner with an alleged crime boss surfaced.

The Independent Broad-based Anti-corruption Commission, however, would not investigate the dinner because it said it did not fall within its jurisdiction.

When asked about the alleged payment to Mr Hodgett's office, Mr Guy said, "Go and ask the people that ran the function, how would I know? I turned up".

"There was an event, David Hodgett ran an event you have to ask David Hodgett on the running of an event, I simply turned up to it."