Carrying a passport or driving licence around as verification for after-dark fun on the town to prove you are 18 or over is fraught with calamity potential but luckily there is an alternative. This is known as the Hospitality New Zealand 18+ card (HANZ 18+ for short).
You will need an application form which can be obtained at any PostShop (these are found nationwide) or you can visit the NZ Post website – www.nzpost.co.nz - and download the form for printing off. Alternatively, some bottle shops, bars and clubs carry application forms.
The 4-page application form is very easy to complete:
You can apply for the card in the month before you turn 18 but the card will not be issued until your 18th birthday.

Before submitting your application you will need to have the following:
Once you arrive at section 6 on the last page of your application form you will see you are required to get a witness signature. The list of persons accepted as authorised witnesses is very specific and has to be one of the following:
Once you have your completed form, the witness signatures and all the supporting documentation you are ready to go. Your application form will need to be handed in at a PostShop by you - the person who is making the application - and you will be required to pay the set fee which as of 2016 is NZ$35.
You will be given a receipt which you are advised to keep until you receive your HANZ 18+ card which will take around 2 weeks. The card will arrive by mail to the address you have submitted on the application form.