A Courier Post contractor in the Waikato region will be spoken to after a video was posted on Facebook that apparently shows employees kicking and throwing parcels.
A NZ Post spokeswoman said the company was alerted to the video yesterday.
"It's absolutely unacceptable," she said today.
"We are investigating the video, and we have identified the contractor involved."
The video, filmed in Waikato yesterday shows at least four men wearing Courier Post uniforms and three Courier Post vans.