Dual nationality with Spain: which countries allow it and what happens with the rest

The most common question after the grant

When the yes from the Ministry finally lands and you see the swearing-in date on your calendar, the question that pops up is almost always the same. Are you going to have to hand over your original passport? Will your country wipe you from its registers the moment you swear loyalty to the King of Spain? Will you still be able to walk into your home country with the document you have used all your life?

The short answer is that it depends on where you come from. Spain has a short list of countries with which it signed direct dual nationality agreements, and for everyone else there is a fairly wide gray zone where the theory says one thing and the practice works differently. You want to understand the difference before you stand in front of the civil registrar, because what you say that day does end up in your file, and because more than one person has shown up at the oath convinced they were about to lose their mother's, partner's or children's passport when it was not true.

In this guide you get the list of countries that are in the good column, what actually happens if yours is not on it, and a quiet risk that few people know about: how you can lose your Spanish nationality without realizing it if you move out of Spain after getting it.

Countries with a direct dual nationality agreement

Spain fully recognizes dual nationality with a specific group of countries, with no extra paperwork, no formal renunciation and no fine print. If your original passport is from any of these, you keep both documents and you are a full citizen in both places.

The list covers all Spanish-speaking Latin America: Argentina, Bolivia, Chile, Colombia, Costa Rica, Cuba, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, the Dominican Republic, Uruguay and Venezuela. Brazil is also in, even though it speaks Portuguese, because it sits inside the Ibero-American block. Nineteen countries in total.

Outside of Ibero-America, four more cases enter the list for historical and cultural reasons: Andorra, the Philippines, Equatorial Guinea and Portugal. If you come from any of these, the rules are the same as with Latin America.

There is also a specific arrangement for people of Sephardic origin, descendants of the Jews expelled in 1492. The 2015 law opened the door to Spanish nationality without requiring them to give up their previous nationality, whatever it is.

In all these cases, you do not have to sign any renunciation on the day of the oath. The registrar will not even bring it up. You walk out of the Civil Registry with Spanish nationality added to what you already had, not in place of it. You keep both passports, you vote where you are entitled to vote in each one, and for practical purposes you are a full dual national. Day-to-day this means you keep entering your home country with the document of a lifetime, you keep your bank accounts, you inherit property without immigration complications, and you can register your kids at either consulate.

If your country is NOT on the list: the theory

This is where the confusion usually starts, and where most people get nervous for no good reason. If you come from a country that is not in the block above, on the day of the oath the Civil Registry will ask you to declare your renunciation to your previous nationality. It is part of the ceremony: the officer reads it out, you say yes, and it gets recorded.

This scenario applies to a wide group of people. Almost the entire European Union except Portugal: Germans, French, Italians, Dutch, Belgians, Poles, Romanians, Bulgarians, Danes, Swedes, Finns. It also applies to those coming from outside the EU who have been living here for years: Americans, Canadians, British, Moroccans, Ukrainians, Russians, Chinese, Pakistanis, Indians, Senegalese, Nigerians, and a long etcetera.

On paper, Spain records that you declared your renunciation. Your file closes clean from the Spanish side: you met the legal requirement. That is the official theory.

In practice: why most people keep both

The reality of how the system actually works is quite different from the theory, and it explains why so many people end up with both passports even though they "officially" renounced at the oath.

The key detail: Spain records your declaration of renunciation, but it does not communicate it to your country of origin. There is no diplomatic email going out saying "dear Moroccan embassy, this person just renounced their nationality." There is no shared database. Spain does not ask you to prove that your country already removed you from its registers either. The renunciation, from the Spanish state's point of view, is complete the moment you declare it in front of the registrar. End of story.

And for your nationality of origin to actually be lost, normally it is your country that has to process it and record it. Since Spain does not send notice, that simply does not happen automatically in almost any case. The result is three pretty distinct scenarios depending on where you come from:

• Countries that accept dual nationality with no issue: Italy, France with some limits, the Netherlands in certain cases, the United States, the United Kingdom in many situations. Even if Spain asked you to renounce, your country does not process anything because its own legislation already lets you be a dual national. Outcome: two valid passports, zero problems.
• Countries that technically do not allow it but do not process it automatically: most African and Asian countries work this way. Your nationality of origin stays active in their registers as long as you do not start a formal renunciation procedure at your consulate. If you do not do it, you stay a national of both.
• Countries that do process the loss quickly: these are the minority. They usually require the citizen to show up at the consulate, fill out a form and pay a fee. If you do not do it, they never find out.

The bottom line in practice is that the vast majority of people who become Spanish keep their previous passport, travel with it when they visit family, and remain full citizens of their country of origin. The renunciation, in many cases, stays as a symbolic step that only lives in the Spanish Civil Registry's archive.

Watch out for losing your Spanish nationality without realizing

There is a less-known case that you want to be very clear on, because it can wipe out everything you worked for: the automatic loss of Spanish nationality after you obtain it.

Picture the scenario. You become Spanish after years of residence, you swear, you get the new DNI, everything perfect. After a while you decide to go back to your country of origin to take care of a relative, or for work, or simply because life takes turns. Three years go by living outside Spain, specifically in the country of your previous nationality, and you do nothing at the Spanish consulate.

In that situation, article 24 of the Civil Code allows the State to consider that you lost Spanish nationality automatically, unless you make an express declaration of preservation at the nearest Spanish consulate. The declaration is free, quick, and you renew it every so often. But you have to remember to do it.

If you live abroad, and especially if you are back in your previous country, set a reminder. You want the first declaration done before you hit three years outside Spain, and then repeated periodically so there is no doubt. It is one of those steps that looks like pure paperwork until the day you try to renew your DNI and discover the State no longer considers you Spanish. Getting it back later is possible, but it involves paperwork, time and sometimes a new residence period, so it pays a lot more to prevent it.

What to do if your country has specific rules

Every case is different, but there are some fairly clear pointers depending on where you come from.

• If you come from Latin America, Andorra, the Philippines, Equatorial Guinea or Portugal: forget about the topic. You have dual nationality guaranteed by treaty, and there is no decision or procedure to make. Enjoy the two passports.
• If you come from the EU (except Portugal): ask at your consulate in Madrid or Barcelona before the oath. Most European countries allow dual in practice and many accept it with no extra step. Italy, for instance, does not process the loss unless you ask for it. France has nuances but usually allows it.
• If you come from the United States, Canada or the United Kingdom: typically you can keep both. The US does not run any automatic procedure and your passport stays valid. Same with Canada and the UK in most cases.
• If you come from Morocco, Ukraine, Russia, China or other African and Asian countries: the usual outcome is that dual nationality holds de facto because your country does not process the renunciation. If you want everything clean on paper, ask at your consulate and arrange the formal renunciation there if they let you.
• If your country does require you to lose its nationality and processes it quickly: now it is a personal call. Some people prefer a clean renunciation, especially if they plan to run for public office in their old country, where dual nationality is sometimes incompatible.

The rule of thumb: unless you have a clear reason to formally renounce, do not create problems the system is not creating for you. State what the registrar asks you to state, sign it, and put the original passport back in the drawer like nothing happened.

When the day of the oath arrives, you want to be clear on the full procedure of the ceremony, not just the renunciation piece. Here you have the path to the nationality oath with the prior steps, the documents to bring and what happens after you walk out of the Civil Registry with Spanish nationality confirmed.