No matter whether you are starting a new relationship, moving in together, been contemplating marriage, have lived together, are married, separating, or divorced there is an agreement to document and protect your interests.
Financial Agreement before, during and ending a Marriage.
Financial Agreement before, during and ending a De facto relationship.
Not sure what a De facto is, please refer to the following reference links...
De facto relationship outside the Western Australia Connection (other Australian States & Territories)
For further information please refer to the Federal Circuit and Family Court of Australia - Relationshipsdocument in regard to a de facto relationship.
Western Australia Connection and De Facto Relationships
For further information please refer to the Family Court Act 1997 (WA) - De facto relationship information