Tokelau → Niue: Short-stay tourist

You likely don't need a visa

Niue's published list of visa-free nationalities doesn't name New Zealand, so check this before you travel. The Immigration Act 2011 (s4) says a New Zealand citizen born in Niue has the right to travel there at any time without a visa; if you are Niuean or descended from a Niuean, carry the Niue exemption sticker (from the Niue Immigration Office) so Air New Zealand lets you board on a one-way ticket. For any other New Zealand citizen we found no Niue page that states the rule, and a third-party guide says no visa is needed, so confirm with the Niue Immigration Office (Immigration.Niue@gov.nu). You still need a passport valid for at least 3 months after you arrive, accommodation booked for your whole stay, a return or onward ticket and enough money for your visit, and you apply for a visitor permit (up to 30 days) when you land. If you plan to stay more than 30 days, apply for a visa in advance. Niue's immigration officers can refuse entry. Heads-up: the list comes from Niue's visa application form and Niue Tourism, undated; confirm with the Niue Immigration Office (Immigration.Niue@gov.nu) before you travel.

Source: Niue Tourism, Government of Niue (Travelling to Niue: visa waiver countries)