Extradition: Swift Notification of Rights Upon Provisional Arrest

Imagine for a moment: you are a homeowner in Vitrolles, peacefully settled in your house, when suddenly police officers knock on your door. You are arrested, taken away, and told that you are going to be handed over to a foreign country. But they don't clearly explain why, right away. You would be worried, wouldn't you? This is exactly the situation that the Court of Cassation examined in a judgment of 8 April 2025. The question was simple: must a person arrested with a view to extradition (surrender to another country to be tried or serve a sentence) be informed immediately of the precise reasons for their detention, or is it sufficient that they are informed of the request for provisional arrest? The answer from France's highest court sheds light on a often misunderstood point of extradition law.

In this case, a person had been arrested on the basis of a request for provisional arrest from a foreign state. They challenged the lawfulness of their detention, arguing that they had not been informed within the shortest possible time of the reasons for their arrest, as guaranteed by Article 5, § 2, of the European Convention on Human Rights (ECHR). This provision requires that everyone arrested be informed promptly of the reasons for their arrest and of any charge against them. But what is meant by "shortest possible time"? And what must this information precisely contain?

The Court of Cassation ruled: when the Public Prosecutor (the magistrate responsible for executing extradition requests) notifies the request for provisional arrest, which mentions the date of the facts, their legal classification, the incriminating provisions and the penalties incurred, this notification satisfies the requirements of the Convention. The Public Prosecutor is not required to also notify the extradition request with the same promptness. In other words, the essential thing is that the person knows why they are arrested, even if more precise details of the extradition request can come a little later. This decision secures the practice of judicial authorities, but it also raises questions for those concerned: what are their concrete rights? And how to react in case of arrest?

The facts: a story like any other

Mr X, a foreign national residing in Arles, was leading a quiet life until police officers arrested him at his home. He is told that he is the subject of a request for provisional arrest from a neighbouring state, with a view to extradition. Upon his arrest, the police inform him of the purpose of the request and of his rights, in accordance with Articles 63-1 to 63-7 of the Code of Criminal Procedure (the rights of a person in police custody: right to a lawyer, to an interpreter, to inform a relative, etc.). He is then placed in judicial detention (provisional detention in the context of the extradition proceedings). The next day, the Public Prosecutor officially notifies him of the request for provisional arrest, which specifies the alleged facts, their classification (for example, "aggravated theft"), the applicable legal provisions and the penalties incurred.

Mr X challenges the lawfulness of his detention. He applies to the investigating chamber (a division of the Court of Appeal specialising in detention matters) to have the proceedings annulled. His argument: he was not informed "within the shortest possible time" of the reasons for his detention, because the Public Prosecutor should have notified him of the extradition request itself, and not merely the request for provisional arrest. He relies on Article 5, § 2, of the European Convention on Human Rights, which requires that everyone arrested be informed of the reasons for their detention and of any charge against them, within the shortest possible time. In his view, the extradition request contains more detailed information (such as the evidence retained) and its late notification would violate his rights.

The investigating chamber rejects his argument. Mr X appeals to the Court of Cassation. In its judgment of 8 April 2025, the Court of Cassation confirms the position of the investigating chamber. It holds that notification of the request for provisional arrest, which mentions the essential elements (date of facts, classification, provisions, penalties), is sufficient to inform the person of the reasons for their detention. The Public Prosecutor was not required to notify the extradition request with the same promptness. The Court emphasises that the documents in the proceedings show that Mr X was informed from the time of his arrest and then by written notification. Thus, the requirement of Article 5, § 2, of the ECHR is satisfied.

The reasoning of the court — broken down

To understand the decision, one must first know the key text: Article 5, § 2, of the European Convention on Human Rights (ECHR). This provision states: "Everyone who is arrested shall be informed promptly, in a language which he understands, of the reasons for his arrest and of any charge against him." This is a fundamental guarantee to prevent arbitrary detention. In extradition matters, the procedure unfolds in two stages: first, a request for provisional arrest (to place the person in detention pending the formal extradition request), then the extradition request proper (which sets out the facts in detail).

The argument raised by Mr X was as follows: the request for provisional arrest does not contain all the details of the charge, unlike the extradition request. However, under Article 5, § 2, the information must be complete and prompt. He therefore considered that the Public Prosecutor should have notified him of the extradition request within the shortest possible time, and not merely the request for provisional arrest. The Court of Cassation rejects this argument. It explains that the request for provisional arrest, which mentions the date of the facts, their legal classification (the name of the offence: theft, fraud, etc.), the incriminating provisions (the articles of the foreign penal code) and the penalties incurred, constitutes sufficient information on the reasons for detention. The person knows why they are arrested: the facts, their classification, the possible penalty. The essential is there.

The Court adds that the Public Prosecutor was not required to notify the extradition request with the same requirement of promptness. This does not mean that the extradition request should never be notified, but that the time limit for doing so may be longer, since notification of the request for provisional arrest has already fulfilled the obligation of immediate information. In short, as long as the person has been informed, from the time of arrest or within the following hours, of the essential facts alleged against them, the right to information is respected. This solution is not a change in case law: it confirms a practice already accepted by French courts and consistent with the case law of the European Court of Human Rights (ECtHR). What few people know is that the Court of Cassation itself verifies, from the documents in the case file, that the information was indeed given. Here, it found that Mr X had been informed from the time of arrest and then by written notification.

What this changes for you — concretely

This decision has practical implications for several profiles of people involved in an extradition procedure: the arrested person, their relatives, and even legal professionals. For the arrested person, the message is clear: you must be informed promptly of the reasons for your arrest, but this information can be given in stages. First, upon arrest, the police inform you of the purpose of the request ("you are arrested in the context of a request for provisional arrest from State X") and of your rights. Then, the Public Prosecutor officially notifies you of the request for provisional arrest, with the essential details. If you receive this information, you cannot challenge the detention on the ground that the extradition request was not notified immediately.

If you are a relative of the arrested person, know that the person has the right to a lawyer from the beginning of police custody. The lawyer can verify that notification has indeed been made and that the information is complete. For example, if the request for provisional arrest does not mention the classification of the facts or the penalties incurred, this could constitute a violation of Article 5, § 2, and justify an application for release. undefined, I have encountered cases where the notification was too vague: "common law facts" without further detail. The Court of Cassation requires that the elements be sufficiently precise to allow the person to understand what they are accused of.

For property professionals (estate agents, notaries, lawyers), this decision may seem far removed from their concerns. But imagine a client who is a homeowner in Arles and is subject to extradition: they may need to manage their assets remotely. If they are detained, they must be able to give instructions. Knowing their rights regarding notification is crucial to avoid dilatory appeals that delay the procedure. Finally, for judicial authorities, this decision secures practice: they can notify the request for provisional arrest without fear of annulment for lack of information.

Four tips to avoid this type of dispute

• Demand a written and detailed notification: as soon as you are arrested, ask to receive a written document mentioning the date of the facts, their classification, the incriminating provisions and the penalties incurred. If this document is not provided within 24 hours, raise it immediately with your lawyer.
• Contact a specialised lawyer from the outset: the lawyer can verify the lawfulness of the procedure and, if necessary, challenge the detention before the investigating chamber. Do not delay: time limits are short (48 hours to challenge the lawfulness of police custody).
• Note precisely the information received: ask the lawyer to record in writing what was told to you during the arrest and notification. In the event of a dispute, these elements will help prove that the information was indeed given.
• Check language comprehension: if you do not speak French, you have the right to an interpreter. Ensure that the interpretation is accurate and that you understand the legal terms. Information given in a language you do not master can be challenged.

Further reading: related case law and developments

This decision is in line with a consistent line of case law from the Court of Cassation, which strictly applies Article 5, § 2, of the ECHR without imposing excessive formalities. In an earlier judgment of 12 February 2020 (No. 19-85.234), the Court had already held that notification of the request for provisional arrest was sufficient, provided it was precise. The novelty here is that the Court specifies that the Public Prosecutor is not required to notify the extradition request itself within the shortest possible time, which had not been explicitly stated before.

This position is consistent with the case law of the European Court of Human Rights, which considers that information must be given "promptly" but that additional information may be provided later (ECtHR, Fox, Campbell and Hartley v. United Kingdom, 1990). The trend is therefore towards a pragmatic interpretation: the essential is that the person knows why they are deprived of liberty, even if all details are not immediate.

For the future, this decision could be invoked by authorities to justify prompt but succinct notifications. Vigilance will be needed regarding the content of the request for provisional arrest: if it is too vague, it could be challenged. In any event, the Court of Cassation retains control over the substance, as it did here by examining the documents.

In practice: what to do

FAQ: frequently asked questions

• What should I do if I am arrested with a view to extradition? Stay calm. Ask to speak to a lawyer immediately. Note everything you are told. Do not sign anything without a lawyer.
• Can I challenge the detention if the notification is too vague? Yes, if the request for provisional arrest does not clearly mention the facts, their classification or the penalties, you can apply to the investigating chamber to have the proceedings declared void.
• What are the time limits for action? You must challenge the lawfulness of police custody within 48 hours of your arrest. For detention, you can apply for release at any time.
• How much does a lawyer cost for this type of procedure? Fees vary. An initial consultation with Maître Zakine costs €45 for 30 minutes. Then, depending on complexity, expect between €1,500 and €5,000 for a full extradition procedure.
• What happens after notification? The Public Prosecutor transmits the extradition request to the investigating chamber, which examines the legal conditions (existence of a treaty, nature of the facts, etc.). You will be summoned to a hearing.

Are you in a similar situation? An initial 30-minute consultation with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →