Northland district commander Superintendent Tony Hill said they had promptly assessed the complaint and spoken to the officer involved.
"They have been reminded about our expectations for staff set out in the police values."
A spokeswoman for the IPCA said they had agreed the language the officer used was unprofessional.
But the IPCA was satisfied with how police had addressed the matter and opted to take no further action against the officer.
Shannon Parker, of the New Zealand Police Conduct Association, said she was pleased to learn Northland police had taken the complaint seriously.
"Being spoken to like that is inappropriate and unprofessional and doesn't induce compliance nor does it inspire people to engage with police," Parker said.
Dunbar said a letter she received from the IPCA informing her of the complaint's outcome had her baffled.
"The IPCA wrote to me but didn't say what had happened, all I got told was, 'while we do not condone the use of unprofessional language, we are satisfied police have addressed this appropriately with the officer and will take no further action'."
She said more details should be given in these circumstances so a complainant is clear on what has and has not happened. She was yet to hear back from Northland police.
Because the matter was dealt with via a confidential employment process no further details were made available by police or the IPCA.
"I hope this cop has learnt something from this," Dunbar said.
The Whangārei man responsible for the clip did not want to be identified but said he was dismayed at the negative attitude towards police generated by the video.
"It was just for a laugh because there was a dude walking down the road with a weed-eater."
The man said he was convinced the officer had said "cuz".