Spanish Citizenship by Descent

Spanish law draws a hard line between nacionalidad de origen (nationality held from birth) and nationality that is later acquired by residence or option. The distinction is not academic: a Spaniard of origin can never be stripped of nationality against their will, and the rules for keeping Spanish nationality while holding a second passport are far more generous for someone of origin than for someone naturalised.

For people with Spanish ancestry, almost every route worth pursuing is a claim to nationality of origin. You are not “applying to become Spanish” so much as asking the state to recognise, and register, a status you already hold. That framing shapes everything below, from which office handles your file to what your existing citizenship is worth once the process is done.

Under Article 17 of the Civil Código, a person born to at least one Spanish parent is Spanish from birth, wherever the birth took place. There is no “grandparent limit” on this route because it is not a descent claim in the Italian or Irish sense — each generation either was, or was not, Spanish at the moment their child was born. If your parent was a Spanish national when you were born, you are Spanish; the task is documentary, not legal.

The mechanism is birth registration at the Spanish consulate for your district (or, in some cases, directly at the Registro Civil Central in Madrid). You file your foreign birth certificate, your Spanish parent’s documentation, and the connecting records, and the consulate inscribes your birth in the Spanish civil registry. Once inscribed you can request a Spanish birth certificate, a DNI, and a passport like any other citizen.

The weak point is any generation that let its Spanish nationality lapse before the next child arrived. A Spanish grandparent who naturalised elsewhere and formally lost Spanish nationality before your parent was born generally breaks the parent-line claim — which is exactly the gap the Democratic Memory Law was written to address. There is a second trap for families abroad. Under Article 24.3 of the Civil Code, someone born and living abroad who is Spanish through a parent also born abroad — and who holds the nationality of the country they live in — loses Spanish nationality unless they declare that they want to keep it within three years of turning 18 (renewing a Spanish passport in that window counts). If your Spanish parent was born abroad, check that this was done, both for them and for you. Two further rules help. If your parent was originally Spanish and born in Spain, you can opt for Spanish nationality at any age under Article 20.1(b), even if they had lost it before you were born. And if a parent or grandparent was originally Spanish, you qualify for naturalisation after just one year of legal residence in Spain (Article 22.2(f)).

The Ley de Memoria Democrática (Law 20/2022) opened a time-limited window for grandchildren — and in some cases great-grandchildren — of Spaniards who went into exile during the Civil War and the Franco dictatorship, and for descendants of Spanish women who lost their nationality by marrying a foreigner under pre-1978 law. It was the widest ancestral route Spain has ever offered.

That application window closed in October 2025. Files submitted to a consulate before the deadline are still working through the system and can take well over a year to resolve, but new grandchild applications under this law are no longer being accepted. If you did not file in time, this specific route is not available, and you should not rely on guides that still describe it as open.

Check the Ministry of Foreign Affairs nationality pages for the current position before assuming anything — deadlines in this area have been extended before, and any further extension would be announced there first.

Every route needs an unbroken paper trail from your Spanish ancestor to you: the ancestor’s Spanish birth certificate, then a birth and (where relevant) marriage certificate for each generation down to your own. Spanish civil records from before the 1950s are often held by the local Registro Civil or the parish; PARES and FamilySearch are useful for locating them, but the consulate will want an official certificate, not a scan.

Ask for certificado literal (a full transcription) rather than an extract — consulates routinely reject extracts. Foreign-issued documents need an apostille under the Hague Convention, and every non-Spanish document needs a translation by a traductor jurado (a translator sworn before the Spanish Ministry of Foreign Affairs) or an equivalent accepted by your consulate.

Name and date mismatches across generations are the usual reason a file stalls. The same person may appear as “José” in one record and “Joseph” in another, or a birth date may differ by a year between the civil and church entries. Resolve these with supporting documents before you file, not after.

Spain has full dual-nationality treaties with most of Latin America plus Andorra, the Philippines, Equatorial Guinea, and — more recently — France and Portugal. If you hold, or are acquiring, a nationality from a treaty country, you keep both without formality.

A nationality you have held since birth alongside your Spanish one is not a problem: you don't have to give it up. Two different rules can still cost you Spanish nationality. If you later voluntarily acquire a non-treaty nationality (for example US, UK or German) while living abroad, you lose Spanish nationality after three years unless you declare before a consulate that you want to keep it (Article 24.1). And if you were born abroad to a Spanish parent who was also born abroad, you must declare that you want to keep Spanish nationality within three years of turning 18 (Article 24.3). Lost nationality can usually be recovered (recuperación), but generally only after taking up legal residence in Spain.

People recognised through the Democratic Memory Law take Spanish nationality of origin and are not required to renounce the citizenship they already hold.