Police overstepped their authority in entering two houses unlawfully.
In Dunedin, the Armed Offenders Squad forced entry to a house where a man was at the door holding an axe handle.
When they saw the man, police retreated and called the Armed Offenders Squad, who ultimately forced their way intothe house to arrest the man and search the premises.
In March last year, officers entered a Masterton house to execute an arrest, without a warrant.
They were concerned the man who was refusing to come out might have firearms and be trying to escape.
A physical altercation inside was deemed justified, but unlawful given they had no right to enter the property,
The Independent Police Conduct Authority said to enter without a warrant, police must believe the person might destroy, conceal, alter or damage evidence or be be likely to escape.
It said in these cases police wrongly interpreted their power and substantially overreached it illegally.
Police have acknowledged the IPCA's findings into the Dunedin incident.
"Police are working to issue a practice note nationally for staff to ensure the legal requirements for entering private property without a warrant are understood."