IANAL but I suspect this is likely down to the details of the mutual legal assistance treaty between the US and NZ, e.g. the result of the US courts processing

IANAL but I suspect this is likely down to the details of the mutual legal assistance treaty between the US and NZ, e.g. the result of the US courts processing a foreign subpoena. Interestingly New Zealand doesn't appear to be a member of the Hague convention so I'm unsure how this is supposed to work in this case. https://en.wikipedia.org/wiki/Hague_Service_Convention https://en.wikipedia.org/wiki/Hague_Service_Convention