A law amendment will make it easier for police to lock up online sexual predators.
From March, police can pretend to be a person under the age of 16 in order to arrest older people grooming them.
Previously, if a police officer was impersonating an underage child it might not have been an offence for someone else to have made sexual advances on them.
The Crimes Amendment Act (No 3) was passed last year to strengthen the ability of agencies to "hold individuals to account for harming the most vulnerable in our community".
Alan Bell of ECPAT Child Alert welcomed the change to the law which made online predators easier to stop.