A man posing as an authorised officer checking on a woman quarantining in Melbourne illegally entered her house and tried to coerce her into having sex.
Victorian COVID-19 Commander Jeroen Weimar said police were investigating the reports.
"I'm aware of a police investigation of someone impersonating an authorised officer seeking to access into the home," he told reporters on Wednesday.
"That must be incredibly distressing. Home officers will always be in uniform, always have appropriate identification and they will never under any circumstances seek entry into your home.
"Please, if you are being visited as part of the home visit program, by one of the authorised offers, ask for ID, check their uniform and if they ask to get into your home, shut the door."
The woman, named only as Phoebe, has told the Nine Network she was up to day four of home quarantine after returning from Sydney.
She says she received a call on the evening of July 14, from a man claiming to be an authorised officer doing a random check.
Half an hour later, he arrived at her house with a document containing her personal details, tricking his way into her bedroom, where he became aggressive.
"He said 'if you make me happy I will lie for you and no one needs to know'," Phoebe told Nine, saying she then kicked him out of her house.
The man is believed to be aged in his twenties.
Australian Associated Press