KEY POINTS:
The Wiesenthal Centre has given New Zealand a D grade for "insufficient and/or unsuccessful effort" at prosecuting Nazis living in the country.
The centre - named after famed Nazi hunter Simon Wiesenthal, who died in 2005 - gave the United States the only A grade, for having de-naturalised 54 Nazi war criminals and collaborators.
It has 16 cases in litigation and a further 222 persons under active investigation.
Australia, Scotland and Estonia got the same grade as New Zealand. Canada, Germany, France and Italy earned a B, while Britain, Argentina, Lithuania, Latvia, Croatia and Costa Rica got C.
Grades of F were issued to Syria and Sweden for deciding not to investigate or prosecute any Nazi suspects.
