Mr Guy said the VEC requested documentation after revelations his former chief of staff Mitch Catlin solicited a billionaire Liberal donor to make more than $100,000 in payments to his private marketing company.
Mr Catlin resigned after the proposed contract, reportedly drawn up by lawyers, was leaked and published in The Age last week.
The VEC immediately announced it had launched preliminary inquiries and Mr Guy revealed he was contacted on Thursday night to hand over documents linked to the matter.
"They've asked me for any documentation we have. We'll provide that for them," he told reporters in Wodonga.
"You'd expect them to do that. They need to do preliminary work but now they've commenced that preliminary work I'll comply and make sure we work with them at every stage, at every step."
The proposal was sent by Mr Catlin to Mr Guy's private email address along with a request it be forwarded to the donor, something the Victorian Liberal leader denies following through on.
Further, Mr Guy insists the contract was never signed or agreed to despite the email reading "as per the original email agreement between you and me".
"I have asked about that because nothing was sent to me prior. There's a discussion behind that ... for Mitch and others to have - it didn't involve me," he said.
Mr Guy denies authorising Mr Catlin to pursue the proposed contract, which would have begun on September 7 last year - the day he ousted Michael O'Brien as Liberal leader.
Under Victorian law, political donations above $1050 must be disclosed and are capped at $4210 over four years for individuals and organisations.
Asked whether it was possible Mr Catlin did not know the contract was a potential breach of electoral laws, Mr Guy said: "Yes. That's very true."
"That's one of the reasons, I might add, that it was certainly never advanced and that all the staff were employed out of my budget."
The Independent Broad-based Anti-corruption Commission and Victoria Police are also assessing referrals from Labor to potentially open investigations into the scandal.
Mr Guy said he is yet to receive contact from either of the agencies and continued to maintain his innocence.
"I would never do anything to contravene or break electoral law," he said.
A VEC spokesperson said the commission could not comment on matters that may be under investigation but reiterated it has initiated preliminary inquiries.
"We are not in a position to allege any wrongdoing but we would welcome anyone who wishes to come forward and provide us with information that they have regarding the matters raised, to do so," it said.
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