A Telstra scam is currently doing the rounds, with customers urged to take care.
It is understood that a scammer is posing as a Telstra employee and hacking in to people's personal computers.
According to a post by Blacktown LAC Police, a couple in Ingleburn were contacted by a woman on the phone who asked them to log into their computer immediately as it was being hacked.
Telstra have advised customers to never give an unsolicited caller remote access to your computer as this exposes you and your online safety.
If you are targeted by such calls, a report should be made to the Australian Competition and Consumer Commission.
Queensland Police have also spoken about the dangers of similar stunts.
"They will request you download a remote access software program like 'Team Viewer' onto your computer," police said.
"Once they obtain access to your computer, they will deposit money into your account and request you purchase iTunes cards or ask you to transfer the money to them using a wire transfer facility such as Money Gram or Western Union.
"Once you have transferred the money or given over the iTunes reference numbers, your money is gone with little to no chance of recovering it.
"There are never any circumstances where a legitimate business or government department will ask for payment using an iTunes gift card or for your help to catch hackers. Quite simply, it is a scam."