Extradition can occur without a formal treaty through ad-hoc arrangements, reciprocity agreements, or comity. Interpol diffusions can be circulated regardless of treaty status. The absence of a treaty does not guarantee safety from arrest or extradition — it merely changes the legal mechanism.
The belief that countries without an extradition treaty are "safe havens" is one of the most persistent and dangerous myths in this field. It reflects a misunderstanding of how extradition works in practice. While a formal treaty provides a streamlined legal framework, extradition can and does occur without one — through ad-hoc arrangements, diplomatic reciprocity, or the principle of international comity. The absence of a treaty makes extradition more complex, but it does not make it impossible.
How Extradition Works Without a Treaty
Without a formal treaty, extradition is governed by the requested state's national law. Many countries have domestic legislation that permits extradition even in the absence of a treaty, typically based on reciprocity — the requesting state agrees to reciprocate in the future. The procedure is more discretionary than under a treaty, and the requested state's executive branch typically has broader authority to decide whether to cooperate.
In some cases, the requesting and requested states negotiate an ad-hoc extradition arrangement for the specific case. This is common in cases involving serious crimes (terrorism, large-scale fraud, organised crime) where both states have an interest in cooperation, even without a general treaty. The ad-hoc arrangement is typically facilitated through diplomatic channels.
Interpol diffusions and Red Notices can be circulated regardless of treaty status. The diffusion is an Interpol instrument, not a treaty instrument, and it can be circulated by any member country against any person. A person in a "no-treaty" country can still be detained on a diffusion, and the requested state can then decide whether to extradite based on its domestic law and political considerations.
Critical Warning for Travelers
The absence of an extradition treaty does not mean you cannot be extradited. Ad-hoc arrangements, reciprocity, and Interpol diffusions can all result in arrest and extradition. Do not rely on the absence of a treaty as a guarantee of safety.
The Limits of "No-Treaty" Protection
- Interpol diffusions: A diffusion can be circulated by any member country and can trigger detention in any other member country, regardless of treaty status.
- Domestic extradition law: Many countries permit extradition without a treaty, based on reciprocity or comity. The decision is discretionary and political.
- Deportation as an alternative: Where extradition is not available, some states use deportation or immigration enforcement to remove a person to the requesting state. This is not formally extradition, but the practical effect is the same.
How Ad-Hoc Extradition Works
Ad-hoc extradition is the process by which a state extradites a person to another state without a formal treaty, based on reciprocity or comity. The requesting state transmits a diplomatic note through its embassy in the requested state, accompanied by the supporting documentation (arrest warrant, charging document, summary of the evidence). The requested state's executive branch — typically the Ministry of Justice or the Foreign Ministry — reviews the request and decides whether to cooperate.
The decision is discretionary. Unlike treaty-based extradition, where the legal framework creates a presumption of cooperation, ad-hoc extradition is a political decision. The requested state considers the seriousness of the offence, the political relationship with the requesting state, the human-rights situation in the requesting state, and the domestic legal framework for extradition without a treaty. Some states are more willing to cooperate than others, and the outcome is less predictable than under a treaty.
Several countries have domestic legislation that permits extradition without a treaty. For example, the UK's Extradition Act 2003 allows the designation of territories for extradition purposes even without a treaty, and several civil-law countries have general extradition legislation that applies in the absence of a treaty. This means that the absence of a treaty does not necessarily mean that extradition is impossible — it means that the legal basis is domestic law rather than international treaty.
Deportation as an Alternative to Extradition
Where extradition is not available — because there is no treaty and no domestic extradition law — some states use deportation or immigration enforcement to remove a person to the requesting state. This is not formally extradition, but the practical effect is the same: the person is removed from the country of residence and transferred to the requesting state's custody.
Deportation is typically based on immigration violations — expired visa, illegal entry, criminal record affecting immigration status. The host country's immigration authority issues a deportation order, and the destination is the person's country of nationality or the requesting state. In some cases, the requesting state has coordinated with the host country's immigration authority to ensure that the person is deported to the requesting state, even where formal extradition is not available.
This practice is controversial — it is seen by some as a circumvention of extradition safeguards — but it has been used in several high-profile cases. The lesson for anyone in a "no-treaty" country is that immigration status must be secure. If the person's immigration status is precarious, the risk of deportation (and transfer to the requesting state) is real, even where extradition is not.
What to Do in Practice: Secure Your Clearance
The absence of an extradition treaty does not guarantee safety. A CCF access request identifies whether any Interpol diffusion or notice exists, which is the primary risk regardless of treaty status. If you are in a "no-treaty" country and suspect an alert, query Interpol through counsel and assess the domestic extradition law of your country of residence.
If you suspect your name is on an international watchlist or have an upcoming flight, do not leave your freedom to chance at a passport terminal. A confidential Interpol lookup or a comprehensive Pre-Travel Legal Check filed through Swiss legal counsel secures absolute clarity within days. Contact our Basel office confidentially to secure your legal travel shield.