It is a good idea to block public access to your personal details associated with your motor vehicle registration plate. This can be done simply over the internet by clicking on the link below which will take you directly the relevant page on the New Zealand Government Transport Association web site.

In New Zealand anyone can obtain the name and home address details of any car registration plate that has not been manually blocked by the owner. If you use the government site below to block access to your details then members of the public cannot get your home address details relating to your car registration. They can just get the make, model, year information. Where they have a legitimate reason for wanting to contact you, they must apply through the New Zealand Police

https://transact.nzta.govt.nz/transactions/PersonalInfoAccess/entry