A former grounds man from the Mangere Lawn Cemetery alleges that the metal body parts from numerous corpses - have been dumped into the grave of another person without the family's knowledge or consent.
He also says babies have been cremated with strangers and their ashes mixed.
The cemetery disputes these allegations and says they've done nothing wrong.
Iulia Leilua filed this report. A warning, it contains pictures of human cremation which some viewers may find disturbing.