You can register a significant relationship if:
How do I prove that I am in a significant relationship?
This can be done in a number of ways:
(a) the duration of a relationship;
(b) the nature and extent of common residence;
(c) whether or not a sexual relationship exists;
(d) the degree of financial dependence or interdependence, and any arrangements for financial support, between the parties;
(e) the joint ownership, use and acquisition of property;
(f) the degree of mutual commitment to a shared life;
(g) the care and support of children;
(h) the performance of household duties; and
(i) the reputation and public aspects of the relationship.
It is not necessary to satisfy all of the above criteria to establish that a relationship is a significant relationship. The court and other bodies who may need to be satisfied that a significant relationship exists between the parties will apply the relevant criteria on a case by case basis. The courts (and other bodies) are not restricted to these factors in determining the existence of a relationship for the purposes of the Relationships Act.
The Relationships Act provides the Supreme Court with the power to conclusively determine whether or not a significant relationship exists or existed, regardless of whether either or both of the partners are deceased.