You can apply for a Copy of Your Conviction Records

Police Clearance Certificate:

The Ministry of Justice is frequently asked to provide a ‘Police Certificate’ or a ‘Police Clearance’ for persons who wish to apply for residence in a foreign country. In New Zealand, there is no such document. However, you can apply for a copy of your conviction records (which you can then show to another party if you wish). Ministry of Justice website http://www.justice.govt.nz/privacy/

The procedure will take approximately 20 business days to complete.

The certificate is accepted by Korean Immigration for up to 6 months from the date of issue, so we strongly recommend that you get started on it right away.

Apostille:

All documents sent to Korean Immigration must have an Apostile Certification. The Authentication Unit of the Department of Internal Affairs issues Apostille Certificates. For information on how to obtain an Apostille Certificate please refer to the website http://www.dia.govt.nz/apostille

*Note that New Zealand legislation cannot bind a foreign government and the ‘Clean Slate’ Act will have no impact on the border and immigration disclosure requirements of overseas jurisdictions. Where a foreign State requires disclosure of all criminal convictions, whether entitled to be concealed or not, all convictions will need to be provided.

The New Zealand Embassy - Seoul

http://www.nzembassy.com/info.cfm?CFID=502&CFTOKEN=99681217&c=8&l=39&s=nz&p=451