There's no single document that proves a relationship is real. That's the part most applicants underestimate about a de facto partner visa. The Department of Home Affairs doesn't look for one strong piece of proof — it looks for a consistent pattern across four separate categories, and a gap in even one of them can weaken an otherwise solid case.
In short: To meet the de facto relationship definition, you and your partner generally need to show you've lived together on a genuine domestic basis for at least 12 months (unless an exemption applies), and provide evidence across four categories — financial, household, social, and commitment — known as the "four pillars." You can't make up for weakness in one pillar simply by piling on extra evidence in another.
The Four Pillars, Explained
1. Financial
Home Affairs wants to see you operate as a shared financial unit. This includes joint bank accounts, shared savings or loans, joint ownership of property or major assets, and evidence of shared bills or household expenses. A joint account isn't compulsory — if you don't have one, you can show financial interdependence another way (one partner covering shared bills, pooled savings for a major purchase), but you should explain the arrangement clearly.
2. Household
This covers the nature of your living arrangements — a joint lease or mortgage, utility bills in both names, and evidence you share domestic responsibilities day to day.
3. Social
Evidence that friends, family, and your wider community recognise the relationship as genuine — joint invitations, social media, photos together over time, and travel records showing you've maintained the relationship, particularly useful if you've spent periods apart.
4. Commitment
This is about the nature and future of the relationship itself — statutory declarations from you and your partner, evidence of shared future plans, and Form 888 statutory declarations from people who know your relationship well. Home Affairs requires a minimum of two Form 888s, though submitting four to six from a mix of family and friends generally strengthens an application.