European Arrest Warrant: Surrender Proceedings in Spain

The European Arrest Warrant (EAW) is the most widely used criminal judicial cooperation instrument within the European Union. When a judicial authority in another Member State seeks a person who is in Spain — either to prosecute them or to have them serve an existing sentence — it does not resort to the diplomatic route of classic extradition; instead, it issues an EAW that is executed directly between judicial authorities. This greatly speeds up the procedure and removes the political element, but it does not strip the requested person of their safeguards: there are exhaustively listed grounds for refusal and full judicial review, exercised in Spain before the Audiencia Nacional. Early, technical defence is what separates an automatic surrender from one that is refused or made conditional.

What the European Arrest Warrant Is

The EAW is a judicial decision issued by the authority of one EU Member State so that another Member State arrests and surrenders a person, in order to prosecute them or to enforce a custodial sentence or detention order. In Spanish law, this mechanism is set out in Law 23/2014 of 20 November on the mutual recognition of criminal decisions in the European Union, which transposed the relevant EU framework and replaced the earlier Law 3/2003.

Its defining feature is the principle of mutual recognition: Spain does not review the merits of the foreign decision or re-examine the evidence; it verifies that the formal requirements are met and that no statutory ground for refusal applies. For this reason, defence is not about "re-trying" the facts in Spain, but careful legal work on whether the EAW's requirements, procedural safeguards and the requested person's fundamental rights are respected. The EAW covers a broad catalogue of offences and, for a list of serious offences punishable by at least three years in the issuing State, removes the double criminality check (that the conduct is also an offence in Spain).

It helps to distinguish two very different procedural positions. One thing is for Spain to receive an EAW from another State and have to decide on surrendering a person who is here — the so-called passive EAW, which is what directly affects someone arrested on Spanish territory; another is for a Spanish judicial authority to issue an EAW to seek a person who is in another EU country — an active EAW. Defence work focuses, in the vast majority of cases, on the first scenario: a person arrested in Spain following a foreign request, who needs immediate advice to decide whether to consent to surrender, which grounds for refusal they can raise, and what their personal situation will be while the matter is resolved. That initial decision, taken in the first hours and often under pressure, shapes the entire later procedure, which is why specialist legal assistance from the very first moment matters so much.

Proceedings Before the Audiencia Nacional

In Spain, the execution of an EAW received from another Member State is handled by the Central Investigating Courts and the Criminal Chamber of the Audiencia Nacional. The procedure unfolds in stages. First, the arrest of the requested person, usually following an alert in the Schengen Information System (SIS). Once arrested, the person must be brought before the Central Investigating Court, which informs them of the existence of the EAW, its content and the option to consent or not consent to surrender, with the assistance of a lawyer and interpreter.

From there, two paths open. If the person consents to surrender, the procedure is fast-tracked and the decision is taken quickly; consent is, as a rule, irrevocable, which makes whether or not to give it one of the most important strategic decisions — and one that should be taken with advice. If the person opposes surrender, a hearing is convened before the Criminal Chamber of the Audiencia Nacional, in which the defence can argue the grounds for refusal, challenge whether the EAW's requirements are met and request guarantees from the issuing State. The decision on surrender takes the form of a ruling (auto), which may be appealed before the full Criminal Chamber. Throughout the proceedings, the Audiencia Nacional also decides on the requested person's personal situation (release or provisional detention), applying criteria analogous to those of any precautionary measure.

Deadlines for the Decision and the Surrender

One feature that distinguishes the EAW from extradition is the brevity of its deadlines, designed to keep cooperation swift. Where the requested person consents to surrender, the judicial decision must as a rule be taken within 10 days of consent being given. Where the person opposes surrender, the final decision must be issued within 60 days of arrest, exceptionally extendable by a further 30 days where justified by the circumstances, notifying the issuing authority.

Once the surrender decision is final, the person must be physically handed over to the issuing State within a maximum of 10 days from that finality. If circumstances beyond the States' control prevent surrender within the deadline, a new date is set and the surrender takes place within 10 days of that new date. Compliance with these deadlines is not a mere formality: an unjustified overrun may have consequences for the requested person's personal situation and, in extreme cases, may even lead to their release. That is why the defence actively monitors the procedural timetable and whether the grounds for any custodial measure ordered during the proceedings still hold.

Two further points matter in practice. First, surrender may be temporarily postponed or carried out conditionally where the requested person is being prosecuted or is serving a sentence in Spain for different facts, so that the Spanish proceedings are not frustrated. Second, the EAW carries the rule of specialty: as a general rule, the surrendered person may not be prosecuted or have a sentence enforced against them in the issuing State for offences committed before the surrender other than those that grounded the warrant, unless an exception applies or the person consents. These mechanisms give the defence additional levers — to time the surrender, to protect ongoing Spanish proceedings, and to limit the scope of what the issuing State may later do.

Grounds for Refusing Surrender

Surrender is not automatic. Law 23/2014 sets out a closed list of grounds for refusal, which the defence must identify and argue. Two groups are distinguished. The mandatory grounds require the court to refuse surrender: for example, where the offence is covered by an amnesty in Spain and the Spanish courts had jurisdiction; where there is double jeopardy (the person has already been finally judged for the same facts in a Member State and, if convicted, has served or is serving the sentence); or where the requested person is below the age of criminal responsibility under Spanish law.

The optional grounds allow the court to refuse surrender, weighing the circumstances of the case. These include limitation (prescription) of the offence or the sentence under Spanish law where the facts fall within Spanish jurisdiction; ongoing criminal proceedings in Spain for the same facts (lis pendens); a decision by the Spanish authorities not to bring or to discontinue proceedings; and, of particular relevance for people with ties to Spain, the case where the EAW has been issued to enforce a sentence and the requested person is a Spanish national or resident in Spain, our country undertaking to enforce that sentence here. Where the conviction was handed down in absentia, the Law requires additional guarantees — notably the possibility of a retrial or an appeal — before surrender can be ordered. The defence's job is to map precisely which grounds apply and to provide the documentation that supports them.

Alongside these listed grounds, European and constitutional case law has consolidated an additional layer of control tied to fundamental rights. Where there are serious indications that, after surrender, the requested person could suffer inhuman or degrading treatment — for instance, because of detention conditions in the issuing State — or that the essential guarantees of a fair trial will not be respected, the executing authority must carry out a specific verification and, where appropriate, request supplementary information from the issuing State before ruling. This control does not allow the merits of the case to be reopened, but it does set an unbreakable limit: mutual recognition cannot translate into a breach of the core of fundamental rights. A defence that detects this kind of risk must document it with reports and objective data, because mere generic allegations are not enough to halt surrender.

EAW Versus Classic Extradition

Although both pursue the same aim — placing a person at the disposal of another country's justice system — the EAW and extradition are different institutions. The EAW operates between EU Member States and rests on mutual recognition: it is a judicial, fast procedure with short deadlines, with no political involvement and, for certain serious offences, no double-criminality check. Classic extradition applies to third States outside the EU and is governed by bilateral or multilateral treaties and by Spain's Passive Extradition Act (Law 4/1985); it is a mixed procedure, judicial and governmental, in which the Government retains the final word on surrender, the deadlines are longer and the review of safeguards is broader.

In practice, this distinction shapes the entire strategy. In an EAW, the defence concentrates on the statutory grounds for refusal, on the guarantees that can be demanded of the issuing State, and on the personal situation during a fast procedure. In extradition to a third State, the room for argument is wider: double criminality, the rule of specialty, the risk of inhuman treatment, political motivations and the final decision of the Council of Ministers. So, faced with an international request, the first step is to identify correctly which instrument applies; if the case involves a non-EU country or an Interpol notice, it is also worth reviewing our extradition defence practice.

Surrender of Nationals and Residents

Unlike classic extradition, where many States traditionally did not hand over their own nationals, the EAW does allow the surrender of nationals and residents between Member States. That said, Law 23/2014 builds in two essential safeguards to protect their ties to the country. The first applies where the EAW is issued to prosecute a Spanish national or resident: Spain may make surrender conditional on the person, once tried and convicted, being returned to Spain to serve the sentence imposed. The second applies where the EAW is issued to enforce a final sentence against a Spanish national or resident: in that case Spain may refuse surrender and undertake to enforce the sentence on Spanish territory.

These safeguards are of enormous practical value for people with family, work and a life in Spain, because they keep the link with their surroundings while the case is heard or the sentence served. Triggering them, however, is not automatic: it requires proving resident status, raising the request at the right procedural moment, and coordinating the terms of the return or enforcement with the issuing authority. The defence documents the requested person's ties to Spain — municipal registration, family life, employment contract, children's schooling — and raises the safeguard as part of the opposition to surrender, so that even where surrender proves unavoidable, the return to serve the sentence close to one's family is secured.