To Say, or Not to Say, “I Do”: When Am I Obliged to Register My Marriage in Portugal?

4 June 2025
Danielle Avidago
Danielle Avidago, photography (immigration consultant)

Danielle Avidago | Immigration Consultant

In this globalised world we live in, it is not uncommon for one Portuguese Jew to get married to a Ukrainian Orthodox in an aphrodisiac beach in the Dominican Republic, have Christian children in Australia, and retire in Portugal. With this private international law mess, one might wonder: in which of these countries am I obliged to register my marriage? Portugal? Ukraine? Australia? All of them?!


Well, I cannot speak for other legal jurisdictions, but I can detail in which scenarios you are obliged by law to register your marriage in Portugal, and in which you are not:

Who is legally required to register their marriage in Portugal, and under what circumstances?

I am a Portuguese citizen who married a Ukrainian citizen in the Dominican Republic. Do I have to register my marriage in Portugal?

Yes, you are obliged by law to register your marriage in Portugal. Every citizen is obliged to update Portugal on their civil status, permanent residence, vital status, and other aspects that identify and protect the citizen in question. Updating your civil status early ensures clarity for future generations, simplifying legal processes that may affect your children later.

I am an Indian citizen who married a Canadian citizen in Jamaica and wish to live in Portugal. Do I have to register my marriage in Portugal?

No, only Portuguese citizens or those who married a Portuguese citizen are obliged to register their marriage in Portugal. A duly legalised version of your marriage certificate will be enough to apply for a residence visa and permit, so you can start your beautiful new chapter together in Portugal. 

I am an American citizen who married a Portuguese citizen in New York, wishing to move to Portugal with our children, to apply for a residence permit as a family member of a Portuguese citizen. Do we have to register our marriage in Portugal?

Yes, because you married a Portuguese citizen, and the Portuguese legal system needs to be informed of this status change so that it can provide residency status for you and your children as the spouse and child of a Portuguese citizen. Registering your marriage in Portugal as early as possible, even before moving, will make life much easier for you and your family.

I am a Mexican citizen who married a Portuguese citizen 6 years ago, and I wish to apply for Portuguese citizenship. Do we have to register our marriage?”

Yes, to apply for Portuguese citizenship for marriage, you are obliged to register your marriage in Portugal. A duly legalised version of your marriage certificate will not suffice for the intended purpose. 

I am an English citizen who has been legally living and working in Portugal for over a year with my Moroccan wife. We now need to provide our tax return to the Portuguese tax authority, and I wish to do so together, as a married couple, and not as separate individuals. Do I have to register our marriage in Portugal?

No, for tax purposes, you do not need to register your marriage in Portugal. You can simply declare to Finanças that you are married and immediately start benefiting from that specific regime. A duly legalised version of your marriage certificate shall suffice. 


To summarise, if you are a Portuguese citizen who got married abroad, you are legally required to register your marriage. Whether you plan to return to Portugal someday or remain elsewhere, notifying your home country of this significant milestone early on will help ensure a smoother future for you and your children.


On the other hand, if you are not a Portuguese citizen, nor have you married a Portuguese citizen, you are not obliged to register your marriage in Portugal. It is possible, however, to request the Civil Registry Office of the foreigner's area of residence to register their marriage if a “legitimate interest” can be proven. A legitimate interest in the eyes of the IRN simply means a concrete reason where the registry of marriage will impact the desired procedure. The Civil Registry may, however, refuse to register the marriage if they do not consider that a real, legitimate interest is behind the request. 


Foreigners may, of course, get married in Portugal when they complete at least 30 days residing in a fixed location in Portugal. But to get married elsewhere and register the marriage in Portugal is not a necessary action for most people´s daily life, nor is it obligatory by law. 


Do you see yourself in any of the above situations? Or perhaps you have a unique case that requires clarification to determine the best course of action? Rest assured, we would be delighted to guide you in deciding whether saying 'I do' in Portugal is the right step for you.



by Tomás Melo Ribeiro 2 September 2025
Tomás Melo Ribeiro | Lawyer
by Danielle Avidago 1 September 2025
Danielle Avidago | Immigration Consultant
Portugal reformed nationality laws, allowing adults born here to obtain citizenship based on birth.
by Joana Loureiro Veríssimo 26 August 2025
Many adults born in Portugal to foreign parents may be unaware that they have a legal right to acquire Portuguese nationality, even without a childhood application.
Marriage is a significant personal status act with wide legal consequences for family and property.
by Margarida Tempera 25 August 2025
For Portuguese citizens who marry abroad, the marriage is valid where it was celebrated but only gains legal effect in Portugal after being properly transcribed.
Corporate tax (IRC) exemption isn’t automatic—it requires formal approval by the Finance Minister.
by António Pratas Nunes and Tomás Melo Ribeiro 22 August 2025
In Portugal, non-profit entities like foundations and associations benefit from a distinct corporate tax regime that recognises their public interest mission.
Entry declaration within 3 days is required under Article 77 of Portugal’s Foreigners’ Law.
21 August 2025
Foreign nationals entering Portugal by land must file a PSP entry declaration within three days, as passport stamps or SIBA forms are no longer accepted as proof.
Most residence permits limit absences to 6 consecutive or 8 non-consecutive months from Portugal.
by Sara Sbai Oliveira 14 August 2025
Holding a residence permit in Portugal grants rights—but also strict obligations. Failing to meet stay requirements can lead to losing your residency status.
A start-up’s legal status defines its access to tax and legal incentives under Portuguese law.
by Margarida Resende 13 August 2025
In today’s innovation-driven economy, start-ups have emerged as agile business models, responding swiftly to the evolving demands of a tech-focused global market.
D6 family reunification visa legal guide for Portugal immigration delays beyond 90 days.
by Margarida Tempera 8 August 2025
D6 visa delayed beyond 90 days? Learn your legal rights and how to use Portuguese administrative law to force AIMA's decision on family reunification applications.
Portugal attracts many EU citizens seeking to live, work, retire, or pursue their studies.
by Sara Sbai Oliveira 4 August 2025
European Union citizens planning to stay in Portugal for over three months (90 days) must apply for a Certificado de Registo de Cidadão da União Europeia (CRUE).
More posts