The Department of Conservation has been convicted over a death in January of a volunteer working on Raoul Island - but no fine has been imposed.
Mihai Muncus-Nagy, 33, from Romania is believed to have drowned after being swept off the rocks while taking sea temperature readings.
An extensive land and water search failed to find him.
DoC had earlier pleaded guilty to failing to ensure the safety of Mr Muncus-Nagy and paid $60,000 in compensation to his family.
The judge at Auckland District Court did not impose any further penalty other than the conviction.
DoC says it has since strengthened its safety procedures on the island.