Spanish Nationality Guide

Spanish nationality is the primary legal bond connecting a person to the State, granting them mutual rights and obligations. According to Article 11 of the 1978 Spanish Constitution, this status is acquired, maintained, and lost in accordance with the law. Beyond its technical definition, nationality is the primary means of full social integration. It develops in two dimensions: a practical one, ensuring legal rights, protection abroad, and the possibility of working in the public sector; and an affective one, related to a sense of belonging and connection to the land.

The Spanish legal system shows a clear disparity that favours groups with shared historical and cultural ties, making their naturalisation process easier due to their greater affinity with Spanish society. It is important to distinguish between Spaniards by origin, who enjoy full protection against losing their nationality, and those who acquire it derivatively, who are exposed to losing it for legal reasons.

1. Nationality by Origin: Automatic Acquisition and Consolidation

Spanish legislation provides for the automatic attribution of nationality based on immediate biological or legal facts, grounded in ius sanguinis and ius solis.

• Ius Sanguinis (Filiation): Those born of a Spanish father or mother are Spanish, regardless of place of birth. This includes adoptive filiation: if a minor under 18 is adopted by a Spanish national, they acquire nationality of origin from that moment.
• Ius Solis (Birth in Spain): (1) Children of foreign parents if at least one of them was born in Spain (except children of diplomats). (2) Children of foreign parents if both are stateless or if the legislation of their countries does not grant them a nationality. (3) Persons born in Spain whose filiation is undetermined (unknown parents) to prevent statelessness.
• Possession of Status (Art. 18 CC): A relevant regulatory development is the consolidation by possession of status. Whoever has possessed and used Spanish nationality for ten years, in good faith and based on a title registered in the Civil Registry, will retain nationality even if that title is subsequently annulled.

2. Nationality by Option

The option right allows certain foreigners to acquire nationality through a unilateral declaration of intent. According to Article 20 of the Civil Code, the following may opt:

1. Persons subject to the parental authority of a Spanish national.
2. Children of a father or mother who was originally Spanish and born in Spain (this is exceptional, as there is no age limit).
3. Persons whose filiation or birth in Spain is determined after the age of 18. In this case, the deadline to exercise the option is two years from the determination.
4. Adopted persons over 18, who have two years from the adoption to exercise this right.

Deadlines: As a general rule, the right to opt expires at the age of 20 (two years after reaching the age of majority or emancipation), except for direct descendants of Spaniards born in Spain.

3. Nationality by Letter of Naturalisation

This route is exceptional and discretionary, granted by the Government through a Royal Decree when special circumstances exist. It does not require residency periods or ordinary integration tests. Historically, it was granted to volunteers of the International Brigades and, following the entry into force of the Democratic Memory Law (20/2022), this right has been extended to their descendants who demonstrate efforts to disseminate the memory of their ancestors and the defence of democracy in Spain, without needing to renounce their previous nationality.

4. Nationality by Residence

This is the main route of derivative acquisition. Since the entry into force of Royal Decree 1004/2015, the procedure is entirely electronic. The required residence must be legal, continuous, and immediately prior to the application. It is crucial to note that "legal residence" excludes periods of stay for studies (student card), which do not count towards these deadlines.

5. Historical Reparation: Democratic Memory Law

Law 20/2022 establishes an extraordinary temporary framework (originally two years from October 2022, extendable by one more year) to opt for nationality in the following cases:

• Descendants of exiles: Sons or grandchildren of those who lost their nationality due to political, ideological, belief-based or sexual identity exile.
• Children of Spanish women: Those born abroad to mothers who lost their nationality upon marrying a foreigner before the 1978 Constitution.
• Adult children: Of those who opted for nationality under this law or under Law 52/2007.

6. Loss and Recovery of Nationality

Loss of Nationality

• Voluntary: By emancipated Spaniards residing abroad who acquire another nationality and do not declare their intention to retain Spanish nationality within 3 years.
• Deprivation (Sanction for non-original nationals): For exclusively using the renounced nationality for 3 years, for military service or political office in another State against express prohibition, or for fraud, falsification or concealment in acquisition (the nullity action prescribes after 15 years).

The Legal Bond and Integration

Spanish nationality should not be understood merely as an administrative formality, but as the formalisation of genuine rootedness. While strategic motivations (mobility, job stability) are legitimate and common, obtaining citizenship culminates an integration process in which the individual acquires the full extent of rights and duties, consolidating their position in the Social and Democratic State governed by the rule of law.

Acquiring Spanish nationality represents the culmination of a social integration process and the establishment of an indissoluble legal bond with the State (Art. 17-28 of the Civil Code). This milestone should not be understood solely from its practical dimension —which guarantees legal certainty and status stability— but also from its affective dimension, as it formalises the sense of belonging and loyalty towards the host society.

1. Verify the Required Residence Period

The fundamental requirement is to prove legal, continuous residence immediately prior to the application. It is vital to distinguish that "residence" is not merely a stay (such as for studies); it must be effective residence backed by a valid authorisation.

Expert note: The "continuity" of residence allows for occasional absences provided they are justified (work, health or study reasons). According to the case law of the Supreme Court (STS), sporadic departures do not interrupt the calculation of time required for naturalisation.

2. Pass the Integration Tests

The State uses the Instituto Cervantes examinations as administrative tools to measure the "affective dimension" and knowledge of Spanish reality.

1. DELE (Level A2 or higher): Certifies basic knowledge of the Spanish language.
2. CCSE: Evaluates constitutional and sociocultural knowledge of Spain.

Exemptions and Strategic Waivers

• By Nationality: Nationals of Spanish-speaking countries (Argentina, Mexico, Colombia, etc.) are exempt from the DELE.
• By Academic Qualifications (Additional Provision 4 of RD 1004/2015): Those who have completed the ESO, Bachillerato or university studies in Spain are exempt from both tests (DELE and CCSE).
• Minors and persons with modified legal capacity: Are exempt from these tests and must provide certificates from their educational or care centre.

3. Gathering the Required Documentation

Meticulous preparation of the digital dossier is key to avoiding the dreaded "administrative requirements" that delay the process by months or years.

• Standard application form duly completed.
• Birth certificate from the country of origin (legalised/apostilled and translated). Exception: Refugees and stateless persons are exempt if they provide the resolution from the Office of Asylum and Refuge (OAR).
• Criminal record certificate from the country of origin (legalised and translated). EU citizens may replace it with an authorisation to consult the Spanish Central Criminal Register to verify their records in their country of origin.
• Complete and valid passport: You must scan every single page, including blank pages. Missing a single blank page is grounds for an administrative requirement.
• Proof of payment of Tax Form 790 (Code 026): The payment must be in the applicant's name.

Specific Additional Documentation

• Married to a Spanish national: Literal birth certificate of the spouse, marriage certificate from the Spanish Civil Registry, and joint cohabitation certificate.
• Refugees/Stateless persons: OAR resolution certifying their status.
• Descendants: Birth certificates of ancestors registered in the Spanish Civil Registry.

4. Electronic Submission of the Application

Since the entry into force of RD 1004/2015, the procedure is strictly electronic.

• Submission channels: You may do it yourself through the electronic headquarters of the Ministry of Justice using a digital certificate or Cl@ve. It is highly recommended to use professionals (Lawyers, Administrative Managers) who hold enabling agreements, ensuring documentation is sent correctly indexed and with proper metadata.
• Notifications: When completing the form, tick the box for consent to electronic notifications. This will allow you to receive the resolution in your "Citizen Folder" immediately, avoiding postal delays.

5. The Administrative Wait and Legal Appeal

The law establishes that the procedure must be resolved and notified within a maximum period of one year from the entry of the application at the Directorate General for Legal Security and Public Trust.

• Administrative Silence: If after one year there is no response, the application is legally deemed rejected. However, at this point you have the right to file a contentious-administrative appeal before the National Court — a very effective strategic measure to force a quick resolution.
• Good civic conduct: Maintaining a clean record is mandatory until the very last moment of the process. A criminal record arising before inscription can nullify an already favourable resolution.

6. The Final Step: Oath and Registration

Once you receive the grant notification, you have 180 calendar days (counted from the day after notification) to make the declarations before the Civil Registry.

1. Oath or promise of allegiance to the King and obedience to the Constitution. Active military personnel in the Spanish Armed Forces are exempt from this oath if they already took it upon joining the military.
2. Renunciation of the previous nationality, unless you are a national of countries with a dual nationality agreement (Ibero-America, Andorra, Philippines, Equatorial Guinea, Portugal or France).
3. Registration and name rules: If you wish to keep two simple names, they must be joined by a hyphen (e.g. Juan-Carlos). If you only have one surname of origin, it will be duplicated to comply with the Spanish tradition of two surnames, unless you request their inversion.

Obtaining Spanish nationality is not simply completing a bureaucratic process; it is achieving full autonomy. This step grants the dignity of being a full citizen, allowing you to participate in political life through voting, access jobs in the Public Administration, and secure your family's stability without depending on residence renewals.