DOOR-TO-DOOR salespeople will be slapped with a $50,000 fine if they knock on doors that have a "Do Not Knock" sticker (pictured right) within the McMahon electorate.
Senator Marise Payne said the new law came into force following a recent win by the Australian Competition and Consumer Commission (ACCC) in the High Court.
"If door-to-door salespeople knock on the doors of consumers who clearly display a 'Do Not Knock' sticker, they are breaking the law and could be liable for a penalty of up to $50,000," she said.
"To assist consumers, free 'Do Not Knock' stickers can be ordered from the ACCC website."
Ms Payne said under Australian Consumer Law, a consumer has a cooling-off period of 10 business days where they are able to cancel an unsolicited consumer agreement.
"If anyone is unsure about how the law works for them, they should contact the ACCC."
Salespeople are not allowed to visit on Sundays or public holidays, before 9am or after 6pm on weekdays, and before 9am or after 5pm on Saturdays.