How to prove a relationship in a New Zealand visa?

Boyfriends and girlfriends can't effectively guarantee each other. Must be a de facto relationship (marriage or de facto marriage).

If you are not registered to get married, then you should take the road of de facto marriage. Requirements:

Live together for at least 12 months (if separated for more than 3 months, please explain the reasons)

Real and stable relationship (for example, both parents support each other, both sides take their relationship seriously, and the relationship is very strong, etc.) )

Have the same property and bear the same responsibilities.

If the above three points cannot be met, or there is no evidence to support it, it is easier to register for marriage.