Victoria's gaming watchdog could finish scrutinising Crown casino over allegations of machine rigging and money laundering within weeks.
The Victorian Commission for Gambling and Liquor Regulation is investigating allegations by federal independent MP Andrew Wilkie that Crown tampered with poker machines at its Melbourne precinct to increase profits and allowed gamblers to dodge money laundering laws.
Gaming Minister Marlene Kairouz says she hopes the VCGLR will report back to her within weeks.
"They have a big task ahead of them. They're looking at this quite diligently. It's a very, very serious matter," she told reporters on Monday.
"They understand that we've got concerns about this ... and as soon as the investigation is complete, I've asked them to report to me."
Crown denies the allegations and has labelled Mr Wilkie's claims "political games" in a full-page advertisement published in News Corp and Fairfax papers across the country.
"Mr Wilkie has said he does not know if the allegations he has referred to, and repeated, are in fact true," Crown Resorts executive chairman John Alexander said in the open letter.
"If he believes he has evidence of wrongdoing, he should stop the political games, step out of the parliament and make his claims without privilege."
In response, Mr Wilkie said he was surprised to see the casino attacking the messenger rather than focusing on investigating the allegations.
"The fact that I made the allegations in parliament is entirely appropriate. After all I am a member of parliament, and the parliament is the best avenue to highlight and have recorded matters of public interest," he said in a statement to AAP.
Mr Alexander said Crown operated in a strictly regulated environment, had a sophisticated anti-money laundering program and took seriously the requirements set by money movement watchdog AUSTRAC.
The AFP confirmed it would investigate allegations by whistleblowers tabled by Mr Wilkie in federal parliament on Wednesday.
In a video, whistleblowers alleged Crown allowed the use of illicit drugs at its Melbourne casino, covered up domestic violence, and avoided scrutiny by AUSTRAC.
They also claimed VCGLR's oversight of Crown had been inadequate.
The casino also allegedly allowed a gambling addict on a self-exclusion register in Perth to spend large amounts of money at Crown in Melbourne, Fairfax Media reported on Monday.
Ms Kairouz urged the casino "to do their job to ensure that those that come into the venue, particularly if they (are) within the high risk category, that they're looked after".