Overview
The Principality of Monaco (Principauté de Monaco) has been a contracting state of the European Convention on Extradition (ECE, ETS No. 24; ratified on 30 January 2009) since 1 May 2009. Extradition between Monaco and the Federal Republic of Germany therefore rests on a settled basis in international law: the ECE and its additional protocols, supplemented by the German Act on International Mutual Legal Assistance in Criminal Matters (IRG). There is no separate bilateral extradition treaty between Germany and Monaco, nor is one needed. Monaco is not an EU member; the European Arrest Warrant does not apply.
Monaco is a functioning constitutional state with an independent judiciary and a close, historically grown link to France, whose legal order shapes the Monégasque court structure and procedural law. In practice, extradition requests from Monaco are relevant above all in the field of economic, tax and financial crime — fraud, breach of trust, money laundering, embezzlement and investment offenses — the focus of criminal prosecution in an international financial and asset center. Violent crime, by contrast, plays a subordinate role.
Since Monaco raises no concerns under the rule of law, the focus of the defense shifts from the classic human-rights bars to the procedural and extradition-law requirements: dual criminality (in particular for charges marked by tax and fiscal criminal law), proportionality, observance of the rule of specialty, double jeopardy (ne bis in idem), and the bar imposed by Article 16(2) of the Basic Law for German nationals.
Legal basis
The decisive instrument is the European Convention on Extradition of 13 December 1957, together with its additional protocols, which governs extradition between the contracting states. On the German side the IRG of 23 December 1982 applies in addition, in so far as the Convention leaves gaps. Under Article 2 ECE, extradition requires dual criminality: the offense must be punishable in both states by a custodial sentence with a maximum of at least one year; in the case of extradition for the enforcement of a sentence, a remaining sentence of at least four months must be outstanding.
For German nationals, extradition to Monaco is excluded under Article 16(2) of the Basic Law; the relaxation in Section 80 IRG applies only to extradition to EU member states and does not extend to Monaco. This bar also applies to dual nationals holding German citizenship. Conversely, Monaco does not extradite its own nationals either (Article 6 ECE in conjunction with the Monégasque extradition rules); on request, domestic prosecution may take their place instead (the principle of aut dedere aut iudicare).
On the Monégasque side, alongside the Convention, the Law No. 1.222 of 28 December 1999 on extradition (Loi n° 1.222 relative à l'extradition) applies, governing matters not covered by, and supplementary to, the treaty. The court structure follows the French model: the court of first instance is the Tribunal de première instance, the appellate court is the Cour d'appel, and the court of last resort is the Cour de révision (a court of review comparable to the French Cour de cassation); Monégasque judicial offices are frequently filled by French magistrates. On the German side, the Higher Regional Courts decide on the admissibility of the extradition (Sections 13 ff. IRG); the granting decision is made by the General Public Prosecutor's Offices, and in cases of fundamental significance or foreign-policy importance by the Federal Office of Justice in agreement with the Federal Foreign Office.
Country-specific issues in Monaco
Death penalty — abolished: The death penalty was abolished in Monaco by the Constitution of 17 December 1962 (Article 20(2)); the last execution dates from 1847. The most severe penalty is life imprisonment. A bar to extradition under Section 8 IRG / Article 11 ECE therefore does not arise from the outset — a key difference from the third states that are problematic under human-rights law.
Rule of law and a fair trial: Monaco has been a member of the Council of Europe (since 2004) and is bound by the European Convention on Human Rights; proceedings before Monégasque courts are subject to the guarantees of Article 6 ECHR. As a rule, there are no indications of political persecution (Section 6 IRG) or of a threat of treatment contrary to human rights. The defense can therefore concentrate on the substantive extradition-law requirements rather than having to challenge fundamental rule-of-law deficiencies.
Economic, tax and financial offenses: The core of Monégasque requests consists of financial and asset offenses. Here dual criminality must be examined with particular care: purely fiscal or tax-law charges are subject to Article 5 ECE (extradition in connection with taxes, duties and customs only as provided by special agreement) and Section 7 IRG. Even for money-laundering, breach-of-trust or fraud charges, a mirror-image review must clarify whether the underlying facts would be punishable in the same way under German law.
Procedural formalities and time limits: Monégasque extradition law sets the requesting state a tight time limit for transmitting the formal request and the required documents — under the practice on Law No. 1.222, up to 40 days from the provisional arrest. If the complete request is not submitted in due time and proper form, the provisional extradition detention must be lifted and the requested person released. Such defects of form and time limit are a practically significant starting point for the defense and should be checked early in every case.
Interpol and provisional arrest: Because many charges have an international financial and asset dimension, in practice a case often begins with an arrest based on an Interpol alert (Red Notice or diffusion) — for instance during the affected person's travels. Even at this stage, before any formal request, legal action is called for: filing a protective brief (Schutzschrift) with the Federal Criminal Police Office and the Federal Office of Justice, reviewing the alert, and — where there are indications of a flawed or disproportionate alert — a deletion request with Interpol's Commission for the Control of INTERPOL's Files (CCF).
Detention conditions and the human-rights review
Monaco has a single, small detention facility — the Maison d'arrêt (a remand and short-term detention facility) at the foot of the Rock. The European Committee for the Prevention of Torture (CPT) has visited the facility several times; in its reports the facility is assessed as only of limited suitability for longer-term detention (limited daylight, little space for outdoor exercise and activities). Ill-treatment or structural deficiencies within the meaning of Article 3 ECHR, by contrast, are not documented; the conditions differ fundamentally from those in states that are problematic under human-rights law.
A country-specific feature concerns the transfer to France of persons sentenced to longer custodial terms: because the Maison d'arrêt is not designed for long-term imprisonment, persons sentenced accordingly are regularly transferred to French facilities to serve their sentences. The UN Committee against Torture (CAT) noted in April 2025 that there was no formalized procedure for recording the consent of those affected and that Monaco exercises no supervision of its own over detention conditions in France. In an extradition case it must therefore be taken into account that a longer sentence would in fact be served within the French prison system — with its known structural occupancy problems; the review developed under Article 3 ECHR (Aranyosi/Căldăraru, ECJ C-404/15 and C-659/15 PPU — to be applied as a standard even outside the European Arrest Warrant) may take on indirect significance in such constellations.
Consular assistance for German nationals is governed by the Vienna Convention on Consular Relations (VCCR). Given the manageable conditions and Monaco's binding obligations under the ECHR, reliable, facility-specific assurances — in so far as required at all in the individual case — are in principle obtainable and verifiable; this clearly distinguishes Monaco from states without an effective monitoring mechanism.
Lines of defense
The defense in Monaco extradition cases is predominantly procedural and substantive in nature. Review framework:
- Article 16(2) of the Basic Law (extradition of Germans): where there is German citizenship — including dual nationals — extradition to Monaco is excluded; Section 80 IRG applies only to EU states. At most, surrogate prosecution in Germany may come into consideration.
- Article 2 ECE / Section 3 IRG (dual criminality): for economic and financial offenses, a careful mirror-image review — would the alleged facts be punishable in the same way under German law?
- Article 5 ECE / Section 7 IRG (fiscal offenses): for charges marked by tax, duty and customs law, extradition only under the special conditions for fiscal offenses — a distinct field for review and challenge.
- Proportionality: for minor or trivial charges and a long lapse of time, the proportionality of the extradition and of the extradition detention must be reviewed; less intrusive means (proceedings in Germany, examination by way of mutual legal assistance) should be kept in view.
- Article 14 ECE / Section 11 IRG (rule of specialty): prosecution and enforcement remain limited to the offenses granted; supplementary requests require separate consent.
- Article 9 ECE / Section 9 IRG (double jeopardy, ne bis in idem): where there is a final judgment or parallel investigations in Germany or a third state, the barring effect must be examined.
- Article 10 ECE (statute of limitations): a prosecution or enforcement time-bar that has accrued under the law of one of the states involved may stand in the way of extradition.
- Defects of form and time limit in the request: incomplete documents or documents not submitted in due time lead to the lifting of the provisional extradition detention (Article 16 ECE); early access to the file and monitoring of time limits.
- Section 73 sentence 1 IRG in conjunction with Article 3 ECHR (detention conditions): as a rule not decisive; but where a long sentence is to be expected and would in fact be served in the French prison system, this must be examined specifically and, where appropriate, a facility-specific assurance obtained.
- Constitutional complaint with an urgent application (Section 32 BVerfGG): after the OLG has declared the extradition admissible, this is the standard remedy where fundamental rights are violated; in constellations that raise no rule-of-law concerns, it must be based on concrete procedural or proportionality errors.
Legal representation in Monégasque extradition proceedings
An extradition case is a specialized mutual-legal-assistance procedure that goes beyond classic criminal defense. Engaging a defense lawyer specialized in extradition law at an early stage is regularly decisive — not only after the formal extradition arrest warrant has been issued, but already from the moment of an arrest based on an Interpol alert, an SIS alert or a European Arrest Warrant.
As a Certified Specialist in Criminal Law with a focus on extradition law, I advise and represent affected persons nationwide before the competent Higher Regional Courts and in constitutional complaint proceedings before the Federal Constitutional Court.