European Union Evidence Law

Overview

European Union evidence law has developed primarily in the context of judicial cooperation in criminal matters, grounded in the principle of mutual recognition of judicial decisions. The Treaty of Lisbon, which entered into force on 1 December 2009, placed judicial cooperation in criminal matters on a firm Treaty footing under Article 82 of the Treaty on the Functioning of the European Union (TFEU). Article 82(1) TFEU provides that judicial cooperation in criminal matters in the Union shall be based on the principle of mutual recognition of judgments and judicial decisions and shall include the approximation of laws and regulations of the Member States in specific areas. Article 82(2) expressly empowers the European Parliament and the Council to establish minimum rules concerning the mutual admissibility of evidence between Member States. This framework has produced a corpus of harmonizing directives and framework decisions that establish procedural rights and create mechanisms for the cross-border gathering and transmission of evidence.

The Principle of Mutual Recognition of Evidence

Mutual recognition is the cornerstone of EU judicial cooperation. It operates on the premise that a judicial decision issued in one Member State should be recognized and executed in another Member State as if it were a domestic decision, without requiring the executing state to review the substantive merits of the decision. In the context of evidence, this means that evidence gathered in one Member State pursuant to that state’s legal procedures should, in principle, be admissible in the courts of another Member State.

The mutual recognition of evidence is not absolute. The European Court of Justice (CJEU) has recognized that mutual recognition may be limited in cases involving fundamental rights, the principle of proportionality, or where the executing state’s essential legal principles would be undermined. The Aranyosi and Căldăraru judgment (Joined Cases C-404/15 and C-659/15 PPU, 2016) established that the execution of a European Arrest Warrant must be postponed or refused where there is a real risk of inhuman or degrading treatment in the issuing state. This principle applies equally to instruments for the mutual recognition of evidence.

The European Investigation Order (EIO) — Directive 2014/41

The European Investigation Order Directive (2014/41/EU) is the central instrument for cross-border evidence gathering in criminal matters within the EU. The EIO replaced the earlier and more fragmented regime of mutual legal assistance and the European Evidence Warrant (Framework Decision 2008/978/JHA), creating a single, comprehensive instrument for obtaining evidence located in another Member State.

The EIO is a judicial decision issued by a competent authority of a Member State (the issuing state) requiring another Member State (the executing state) to carry out one or several specific investigative measures for the purpose of gathering evidence. The EIO may be issued in criminal proceedings, in proceedings brought by administrative authorities in respect of acts punishable under national law, and in proceedings relating to the prosecution and punishment of criminal offences.

Article 6 of Directive 2014/41 requires the issuing authority to assess the necessity and proportionality of the requested measure, considering the rights of the suspect and the victim and the availability of less intrusive measures. This assessment must be documented in the EIO. The executing state may not refuse to execute the EIO on grounds relating to the necessity or proportionality of the measure, as this assessment falls within the competence of the issuing state.

The executing state may refuse recognition or execution on specified grounds under Article 11, including: (a) immunity or privilege under the law of the executing state; (b) the principle of ne bis in idem (double jeopardy); (c) where the EIO relates to an offence that is statute-barred under the law of the executing state; (d) where there are substantial grounds to believe that execution would be incompatible with the executing state’s obligations under Article 6 TEU and the Charter of Fundamental Rights; (e) where the measure would not be available in a similar domestic case. The executing state must recognize and execute the EIO within strict time limits: a decision on recognition must be taken within 30 days, and the investigative measure must be carried out within 90 days.

The EIO Directive includes specific provisions for particular investigative measures. Articles 30–31 govern the interception of telecommunications, requiring the issuing state to specify the purpose, the offence, and the person whose communications are to be intercepted. Articles 22–24 address the temporary transfer of persons in custody for investigative purposes. Article 32 provides for the temporary transfer of persons in custody for the purpose of hearing them as witnesses.

The European Arrest Warrant — Framework Decision 2002/584

The European Arrest Warrant (EAW), established by Council Framework Decision 2002/584/JHA, is the most widely used mutual recognition instrument in EU criminal law. The EAW replaces traditional extradition procedures between Member States with a simplified judicial surrender mechanism. A judicial authority in one Member State may request the arrest and surrender of a person to another Member State for the purpose of conducting a criminal prosecution or executing a custodial sentence.

The EAW operates on the basis of dual criminality for a list of 32 categories of serious offences (including terrorism, organised crime, drug trafficking, money laundering, and corruption) for which dual criminality is not required, provided the offence is punishable by a maximum of at least three years’ imprisonment. For other offences, the executing state may require dual criminality.

The Framework Decision provides mandatory and optional grounds for non-execution. Mandatory grounds include amnesty in the executing state, ne bis in idem, and the person’s immunity. Optional grounds include dual criminality requirements and the possibility that the executing state undertakes to prosecute the person for the same acts under its own law. Following Aranyosi and Căldăraru, the executing judicial authority must assess whether there is a real risk of inhuman or degrading treatment in the issuing state and may postpone or refuse surrender if such a risk exists.

The Right to Interpretation and Translation — Directive 2010/64

Directive 2010/64/EU establishes minimum rules on the right to interpretation and translation in criminal proceedings. The Directive guarantees that suspects and accused persons who do not speak or understand the language of the proceedings have the right to interpretation during all stages of the proceedings, including police questioning, all court hearings, and necessary interim hearings. The right extends to communication between the suspect and their lawyer directly relating to the proceedings. The Directive also guarantees the right to translation of essential documents, including decisions depriving a person of liberty, charges, judgments, and any document that is essential to ensuring the fairness of the proceedings.

The Right to Information — Directive 2012/13

Directive 2012/13/EU on the right to information in criminal proceedings requires Member States to ensure that suspects and accused persons are informed promptly of their procedural rights. Article 3 requires that persons be informed of their right to access a lawyer, the right to free legal advice, the right to be informed of the accusation, the right to interpretation and translation, and the right to remain silent. Article 4 requires that persons arrested or detained receive a Letter of Rights specifying these entitlements in a language they understand.

Article 7 of Directive 2012/13 guarantees access to case materials. Persons charged with a criminal offence must have access to at least all evidence in the possession of the competent authorities, whether for or against the suspect. This right is essential for preparing a defence and challenging the evidence relied upon by the prosecution.

The Right of Access to a Lawyer — Directive 2013/48

Directive 2013/48/EU establishes minimum rules on the right of access to a lawyer in criminal proceedings and in European Arrest Warrant proceedings. The Directive guarantees the right of suspects and accused persons to have access to a lawyer without undue delay, from the time of questioning by police or before the commencement of any investigative or evidence-gathering measure. The right includes the presence of the lawyer during questioning, during identity parades, and during investigative acts. For EAW proceedings, the Directive guarantees the right of the requested person to access a lawyer in the executing state and in the issuing state.

The Presumption of Innocence — Directive 2016/343

Directive 2016/343/EU on the strengthening of the presumption of innocence and the right to be present at trial codifies fundamental safeguards. Article 4 prohibits public authorities from referring to suspects or accused persons as guilty before a final conviction, without prejudice to evidentiary statements or procedural decisions. Article 5 places the burden of proof on the prosecution, and any reasonable doubt must benefit the accused. Article 7 guarantees the right to remain silent and provides that the exercise of this right shall not be used as evidence against the suspect or accused. The Directive also prohibits the use of coercive measures that undermine the presumption of innocence.

Procedural Safeguards for Children and Legal Aid

Directive 2016/800/EU on procedural safeguards for children who are suspects or accused persons in criminal proceedings establishes special protections for minors, including the right to information, the right to a lawyer, individual assessment, and the right to privacy. Directive 2016/1919/EU on legal aid guarantees access to legal aid for suspects and accused persons who lack sufficient resources, both in domestic proceedings and in EAW proceedings.

Taking of Evidence in Civil Matters — Regulation 2020/1783

Regulation (EU) 2020/1783 on cooperation between the courts of the Member States in the taking of evidence in civil or commercial matters, replacing Regulation (EC) No 1206/2001, governs the cross-border taking of evidence in civil proceedings. The Regulation establishes two methods for obtaining evidence located in another Member State. The first is the request to the competent court of another Member State to take specific evidence, transmitted directly between courts without the involvement of central authorities. The second is the direct taking of evidence by the requesting court in the territory of another Member State, permitted where the taking is voluntary and the executing Member State has not imposed conditions.

The Regulation requires that the requested court execute the request expeditiously, normally within 90 days. The requesting court may specify the procedural formalities to be followed, which the executing court must observe unless they are incompatible with its law. The Regulation also facilitates the use of video conferencing and other communication technologies for the taking of evidence. The parallel Regulation (EU) 2020/1784 on the service of documents complements the evidence-taking regime by ensuring the effective transmission of judicial and extrajudicial documents between Member States.