Buy a New Zealand Apostille Authentication. Order a Department of Internal Affairs Apostille. Buy a fake diploma. How to buy a New Zealand Apostille Authentication for diploma? The Department of Internal Affairs (DIA) (Māori: Te Tari Taiwhenua) is New Zealand’s public service department, responsible for issuing passports; administering citizenship and lottery grant applications; enforcing vetting and gambling laws; registering births, deaths, marriages and civil unions; providing support services to Ministers; and advising the Government on a range of related policies and issues.