A Holocaust historian, Dr Zuroff founded the centre in 1986 which has tracked and identified more than 2800 suspected Nazi war criminals. Many of those war criminals were discovered to have fled to Western democracies, and the centre has worked with countries to bring suspects to trial.
In 1987, Canada passed legislation to enable prosecution of suspected Nazi war criminals and was followed by Australia in 1989, and Great Britain in 1991. New Zealand set up a two-person unit in 1991 to investigate allegations that perpetrators of war crimes settled in this country.
The unit spent $190,000 investigating the claims in New Zealand and overseas, narrowing the suspected list from 46 to 17 known to be alive and living in the country.
The Wiesenthal centre had supplied 42 of the 46 names. Fifteen were cleared and two were further investigated, with the unit finding it was "possible" one of the suspects was involved in war crimes.
The finding of the unit was presented by the then attorney-general, Mr Paul East.
Dr Zuroff said the centre tried to convince successive New Zealand governments to take legal action against suspected Nazis, but to no avail.
During the 1980s and 1990s, Dr Zuroff researched the whereabouts of 40 suspected war criminals who are believed to have emigrated to New Zealand after World War 2.
Dr Zuroff visited New Zealand in February 2006 to promote Operation Last Chance, which was a last attempt to find surviving Nazi war criminals.
"By the time that I found these people, many were no longer alive.