Does Spain extradite to the US? Yes. Spain and the United States have had a bilateral extradition treaty for decades, and Spanish courts regularly decide on American requests, often involving fraud, drug trafficking, cybercrime or money laundering. But extradition is never automatic. Every request goes through a government phase and a court phase before the Audiencia Nacional in Madrid, the person sought has a lawyer and a hearing, and there are legal grounds on which Spain must or may refuse. This guide explains how the process works and what matters most in practice.
Key points
- Extradition from Spain to the US is governed by the bilateral treaty and, where the treaty is silent, by Spain's Passive Extradition Act (Law 4/1985).
- The court decision is taken by the Criminal Division of the Audiencia Nacional after a hearing; if the court refuses, that refusal is final. If it approves, the Spanish Government still has the last word.
- Spain does not extradite its own nationals, and refuses extradition for, among other things, political offences, time-barred offences or where there are no adequate guarantees on the death penalty.
The legal framework
Extradition between the two countries is based on the extradition treaty signed in Madrid in 1970, amended by several supplementary treaties, and on the 2003 extradition agreement between the European Union and the United States. [VERIFY: date of the 1970 treaty, dates of the supplementary treaties and entry into force of the EU–US agreement, with BOE references]
In Spain, the domestic rules are in Law 4/1985 on Passive Extradition (Ley de Extradición Pasiva). According to its article 1, the law applies except where a treaty to which Spain is a party provides otherwise. Extradition is granted only on the basis of reciprocity, and the Spanish Government may require a guarantee of reciprocity from the requesting state.
Our article on the extradition process in Spain explains the general framework, including the different system for EU countries.
How the procedure works, step by step
1. Arrest
Many cases start with an urgent request for provisional arrest, often through an Interpol notice. The arrested person must be brought before the duty central investigating judge (Juzgado Central de Instrucción) within 24 hours. If the United States does not file the formal extradition request within 40 days, the provisional detention lapses (article 8 of Law 4/1985). If the request arrives within that period, the time limit is extended by another 40 days (article 10).
The judge can release the person with conditions such as reporting duties, surrender of the passport or bail.
2. First hearing and consent
At the first appearance, with a lawyer and an interpreter if needed, the judge asks the person whether they consent to extradition. If they consent and there is no legal obstacle, extradition can be granted quickly (article 12). Consent has serious consequences and should never be given without independent legal advice.
3. The government phase
The formal request is sent through diplomatic channels and must include the arrest warrant or judgment, a description of the facts, the applicable US legal provisions with their penalties and any assurances required by Spanish law (article 7). The Spanish Government then decides whether the court phase should go ahead. [VERIFY: article 9 of Law 4/1985 on the government decision to continue the judicial phase]
4. The court phase at the Audiencia Nacional
The file is made available to the prosecutor and the defence for three days (article 13). A hearing is then held within fifteen days, where the evidence is limited to matters relating to the treaty and the legal requirements (article 14). The court is not deciding whether the person is guilty: it checks whether the legal conditions for extradition are met.
The Criminal Division rules by a reasoned decision (auto) within three days of the hearing. This decision can only be challenged by a súplica appeal decided by the full Criminal Division (Pleno de la Sala de lo Penal) (article 15). [VERIFY: whether a constitutional appeal (recurso de amparo) is available after the Pleno's decision]
5. The Government's final decision
If the court refuses extradition, the refusal is final and binding. If the court approves it, the Spanish Government is not bound: it may still refuse on grounds of reciprocity, security, public order or other essential Spanish interests, and there is no appeal against the Government's decision (article 6). Once extradition is granted, the person is handed over to US officials on an agreed date (article 19).
We describe a successful defence in how we secured the dismissal of an extradition case.
Grounds for refusal
Law 4/1985 sets out several grounds on which Spain refuses extradition, and others on which it may refuse:
- Minimum seriousness and double criminality: the conduct must be a crime under both Spanish and US law, punishable with at least one year in prison, or, if there is already a conviction, a sentence of at least four months (article 2).
- Spanish nationals: Spain does not extradite its own citizens, nor people accused of offences that Spanish courts have jurisdiction to try. Nationality acquired fraudulently to avoid extradition does not count (article 3).
- Political and military offences, with exceptions such as terrorism (article 4).
- Extinguished liability: for example, where the offence or sentence is time-barred (article 4).
- Prior proceedings in Spain for the same facts (article 4).
- Death penalty and inhuman treatment: extradition is refused if the US does not give sufficient guarantees that the death penalty will not be imposed or carried out, or that the person will not be subjected to inhuman or degrading treatment (article 4).
- Discretionary grounds: Spain may refuse where there are well-founded reasons to believe the request is really aimed at persecuting someone for their race, religion, nationality or political opinions, or where the person is under 18 and habitually resident in Spain (article 5).
Long US sentences raise a further question. Spanish courts have in some cases required assurances that a life sentence will not be served without any possibility of review. [VERIFY: Audiencia Nacional and Constitutional Court case law on life imprisonment guarantees in US extraditions]
Practical scenarios
The following examples are illustrative, not real cases:
- A US citizen living on the Costa del Sol is arrested on an Interpol notice for alleged wire fraud. The key questions are whether the facts are also a crime in Spain, whether part of the alleged fraud was committed in Spain (which could give Spanish courts jurisdiction) and whether the person can be released while the case continues.
- A dual Spanish and US national is sought by US prosecutors. Spanish nationality is a bar to extradition, although the person may still face proceedings in Spain for the same facts. [VERIFY: obligation to prosecute in Spain when extradition of a national is refused]
What to do if you or a relative is arrested
- Ask for a lawyer immediately and do not consent to extradition before receiving advice.
- Use the right to an interpreter and to remain silent about the facts of the case.
- Gather documents that prove residence, work and family ties in Spain to support a request for release.
Our guide to your rights when arrested in Spain explains the rights of foreign nationals in custody.
Frequently asked questions
How long does extradition from Spain to the US take?
If the person consents, it can be a matter of weeks. If the request is contested, the court phase, the appeal to the full Criminal Division and the Government's decision usually take several months. [VERIFY: typical duration of contested US extradition proceedings at the Audiencia Nacional]
Can I be released while the extradition case is pending?
Yes. The judge can release the person at any time with measures such as reporting to the court, surrendering the passport or paying bail. Strong ties to Spain make release more likely.
Does Spain extradite Spanish citizens to the US?
No. Spanish law bars the extradition of Spanish nationals. Nationality is assessed at the time of the decision.
Conclusion
Spain does extradite to the United States, but only after a two-stage procedure with real legal safeguards. Time limits, nationality, double criminality and the guarantees offered by the US often decide the outcome, and the first days after an arrest are decisive.
If you or a family member is facing a US extradition request in Spain, our extradition and European Arrest Warrant lawyers can act from the first hearing. Contact our firm in English, Spanish or German.
