De facto union: the court step before the paperwork

If you live with a Portuguese citizen and you are not married, Portugal does have a route to nationality for you. It is not the same route as marriage, though, and the difference is one whole step: before you can file anything with the registry office, a Portuguese court must formally recognise your relationship in a judgment. No court decision, no application.

This trips people up because in every other corner of Portuguese life a de facto union is proved with a simple certificate from the local parish council. Tax, employment leave, social security, housing — the certificate works. For nationality it does not. This guide explains where the requirement comes from, what the 2026 nationality law reform changed about it, and which parts of the answer nobody can currently give you.

Two separate systems, and only one of them is a counter

It helps to picture the route as two halves that barely talk to each other.

The first half is judicial. You bring an action in a Portuguese court asking it to declare that you and your partner have been living together in conditions analogous to marriage. The court hears it, decides it, and issues a judgment. That is a lawsuit, not a form.

The second half is administrative and looks like every other nationality filing: you go to the Central Registry Office — or a consulate, or a civil registry office — hand in the declaration with the court judgment attached, and wait. Nationality applications in Portugal run through the IRN and the Ministry of Justice. AIMA, the immigration agency, is not involved in this at any point, whatever a forum post told you.

What the statute actually says

The wording matters more than any paraphrase, because the order of the words is the rule:

In English: a foreigner who, at the date of the declaration, has been living in a de facto union for more than three years with a Portuguese national may acquire Portuguese nationality after the issuing of the judicial recognition decision by the competent court.

Note the two time references. The three years are measured against the day you file at the registry — not against the day you sued. And the judgment must have been issued, which is a stricter test than the previous wording, which spoke of an action to be brought.

What the 2026 reform changed here

Two changes, and the second is the one nobody has written about.

1. Until 18 May 2026

   The statute granted nationality «after an action for recognition of that situation, to be brought in the civil court». It named the court, and it spoke of bringing an action.
2. 18 May 2026

   Lei Orgânica n.º 1/2026 is published and rewrites the provision: it now requires the issuing of the recognition decision by the competent court.
3. 19 May 2026

   The new wording takes effect. The reference to the civil court is gone; the requirement that the decision already exist is explicit.
4. 31 August 2026

   The implementing Regulation still carries its 2022 wording, and we found no ministerial order saying which court is now the competent one.

The first change adds the full length of a lawsuit to your timeline. The second removes the only sentence in the whole scheme that told you where to file it.

Which court? The honest answer is that it is unsettled

The judiciary organisation act gives family and juvenile divisions jurisdiction over proceedings concerning de facto unions, and, as a catch-all, over other actions concerning personal civil status and family. Read on its own, that points to a family court.

Portuguese appellate courts have been asked. The Coimbra Court of Appeal held, in a judgment of 28 April 2026, case 4562/25.1T8CBR.C1, that civil-division judges are competent to hear and decide an application for judicial recognition of a de facto union with a view to obtaining Portuguese nationality. Its reasoning rested on the special jurisdictional attribution then contained in the Nationality Act itself.

That judgment predates the new wording by three weeks. It construed a phrase that has since been deleted. Whether the outcome survives on other grounds, or whether the question reopens, has not been settled in any published decision we could find as of 31 August 2026. If you are filing now, treat the choice of court as a question for the lawyer who signs the pleading, not as settled background.

Two years to exist, three years to count

Portuguese law defines a de facto union as two people living in conditions analogous to marriage for more than two years. That is the threshold at which the union starts producing legal effects for tax, employment and housing purposes.

Nationality asks for more than three years, measured at the filing date. So the union can be fully established for every other purpose and still be short for this one. Plan backwards from the day the judgment is expected, not from the day you file the lawsuit.

Things that rule you out before you begin

The de facto unions act lists, exhaustively, what blocks rights founded on the union:

• being under 18 at the date the union is recognised;
• notorious mental incapacity, or a court-declared adult guardianship, unless it began after the union did;
• an undissolved marriage of either partner, unless a judicial separation of persons and property has been decreed;
• direct-line or second-degree collateral kinship, or direct-line affinity;
• a prior conviction of either partner as principal or accomplice in intentional homicide, even attempted, against the other's spouse.

The undissolved-marriage rule is the one that catches real people. If you are still legally married in another country, this route is closed until that divorce is recognised and registered in Portugal, no matter how long your current relationship has lasted.

Why the parish council certificate is not enough

The general rule on proving a de facto union is deliberately generous: it may be proved by any legally admissible means — where no statutory or regulatory provision requires specific documentary proof. That final clause is the whole story.

For nationality, such a provision does exist, and it requires a judgment. So the parish council certificate, the joint residence attestation and the sworn statement — the trio that settles almost everything else — do not open this door. The registry office is not being difficult; it is applying the text.

What you hand in after you win

Once the judgment is final, the administrative half is short. The declaration is filed together with:

• a certified copy of the recognition judgment;
• a certified copy of the Portuguese partner's birth record, which the registry can waive if it can obtain it itself;
• a statement by the Portuguese partner, made less than three months earlier, confirming that the union is still ongoing.

That statement can be given in person and orally at the Central Registry Office, at its branches, at civil registry offices or at Portuguese consular services — or in a document signed by the Portuguese partner showing their citizen card number, its date and issuing authority.

Say the consequence out loud: the route depends on a voluntary act by your partner, performed at the end and valid for only three months. A de facto union dissolves by the will of a single partner, with no formality at all. If the relationship ends between judgment and filing, or your partner declines to sign, the judgment you paid for buys you nothing here.

Lawyer, court fees, and legal aid

Because this is litigation, two costs appear that the purely administrative routes do not have: the court fee and a lawyer.

On the lawyer: Portuguese civil procedure makes representation mandatory in cases where an ordinary appeal is available, and actions concerning personal civil status are always deemed to be worth the Court of Appeal's jurisdictional ceiling — 30,000 € — plus one cent, precisely so that they land above it. If your action is characterised that way, counsel is compulsory rather than advisable. Confirm the characterisation before assuming otherwise.

If cost is the obstacle, Portugal's legal aid scheme covers court fees and lawyer's fees for those who prove insufficient means, and it is available to people living abroad. We covered how to apply in the guide on legal aid for people living outside Portugal.

Does the citizenship test apply to this route?

No. Acquisition by marriage or de facto union is a declaration route: it never passes through the naturalisation knowledge requirements, so neither the language exam nor the future civic test is part of it. That is not an exemption granted to you — the test simply was never in this provision.

What the 2026 reform did add is a security condition: acquisition by marriage or de facto union now depends on none of three situations applying — certain serious convictions, being a threat to national security, and being subject to UN or EU restrictive measures. Separately, the public prosecutor can still oppose the acquisition for lack of an effective connection to the national community, which we explain in the guide on proving an effective connection.