Embattled Liberal-National MP Andrew Laming is under investigation by the electoral commission over more than 30 Facebook pages operated without political authorisation disclosures.
Guardian Australia reported Mr Laming was behind the pages, which attack political opponents with pro-LNP material.
An Australian Electoral Commission spokesperson confirmed the Facebook activity would be investigated over the requirement for electoral authorisation designed to allow voters know who is communicating.
The Facebook pages include Redland Bay Bulletin, which has a similar name to local news site the Redland City Bulletin.
"We welcome new families, update the issues and keep a close eye on politicians and their promises," the Facebook page says.
Another is called the Redlands Institute, which describes itself as a forum for balanced discussion of major issues.
Dr Laming is quitting politics at the next election after being accused of harassing two female constituents and taking a photo of a woman while she was bending over.
Prime Minister Scott Morrison has resisted calls to dump him from the coalition party room with the government holding a wafer-thin majority in the lower house.
Dr Laming has not denied taking the photo without the woman's consent but says there was nothing untoward.
He is also under fire after admitting to bullying, stalking and harassing various women over several years.
The 54-year-old has been given a month of paid medical leave to seek counselling and empathy training.
Women's Safety Minister Anne Ruston called on Dr Laming to have a "very serious think about the implications of his actions on other people".
"I will leave the investigation to the AEC. But... we need everybody who is a perpetrator, we need to get them to understand the impact of their actions on other people," Mr Ruston said.
"Governments alone can't solve this problem. The only way that we are ever going to end violence against women and their children is if every Australian takes a role in stamping this scourge out."
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