A lobby group says it has evidence to back up its campaign against New Zealand's anti-smacking laws.
Family First today released legal findings into cases that have come under the legislation.
The organisation hired high-profile law firm, Chen Palmer, to look at the cases and a DVD reveals what Family First says are examples of good parents being criminalised by the anti-smacking law.
"Family First has invested a lot of time, energy and resources in exposing the real effect of the anti-smacking law," director Bob McCoskrie says.
"Politicians have always said if good parents are criminalised for a light smack they will change the law, what the opinion from Mai Chen shows is that good parents are being criminalised," Mr McCoskrie said.
Since the law came into effect seven years ago, there have been just eight prosecutions for 'smacking' but Family First wants the 'light smack' to be decriminalised.
However, former MP Sue Bradford, who championed the bill, said she finds it "phenomenal" that Bob McCoskrie and Family First continue their "relentless campaign" to try to change the law that in the end is only there to "protect our children".
Family First says nearly 600 families have endured the stress of being investigated for abuse but Ms Bradford says other nations are now following New Zealand's lead.
"Over 40 countries in the world now have legislation similar to ours that says we are not able to legally physically assault our children in the name of discipline."
And Prime Minister John Key isn't wavering from his stand that good parents are not being criminalised for a light smack, saying he thinks the law is "set in about the right place".