Principles Governing Extradition

Principles Governing Extradition are the legal rules that regulate the surrender of a person by one State to another State for criminal prosecution or enforcement of a sentence. These principles balance international cooperation, State sovereignty, criminal justice and protection of individual rights.

1. Principle of Dual Criminality

The principle of dual criminality requires that the conduct for which extradition is requested generally constitute a criminal offence in both the requesting State and the requested State.

For example:

Conduct → offence in State A

Same conduct → offence in State B

↓

Dual criminality satisfied

The precise test may differ between extradition treaties.

2. Rule of Speciality

Under the rule of speciality, a person extradited for a particular offence should generally be prosecuted or punished only for that offence, or for offences permitted under the applicable extradition arrangement.

For example:

Extradition granted for Offence A

↓

Requesting State → prosecutes for Offence A

↓

Cannot ordinarily prosecute for unrelated Offence B

unless the required consent or treaty exception applies.

The principle prevents extradition from being used as a means of obtaining custody of a person for an unrelated prosecution.

3. Political Offence Exception

Traditionally, extradition may be refused where the offence is considered a political offence.

The rationale is to prevent extradition from becoming an instrument of political persecution.

However, modern extradition treaties increasingly exclude serious offences such as:

• terrorism;
• certain forms of violence;
• offences covered by international criminal conventions.

The precise scope of the exception depends upon the applicable treaty and domestic law.

4. Principle of Non-Extradition for Military Offences

Some extradition treaties exclude purely military offences.

These may include offences that arise solely from military discipline and do not constitute ordinary crimes.

The rule depends upon the applicable extradition arrangement.

5. Principle of Non-Extradition for Fiscal Offences

Historically, fiscal offences were sometimes excluded from extradition.

Modern treaties may permit extradition for specified tax and other fiscal offences.

Therefore, the current position depends upon the relevant treaty or domestic legislation.

6. Principle of Non-Extradition of Nationals

Some States refuse to extradite their own nationals.

This is not a universal rule of International Law.

Where extradition of nationals is prohibited, the State may, where required by an applicable treaty or legal rule, consider domestic prosecution.

This is connected with the principle:

Aut dedere aut judicare

meaning:

“Either extradite or prosecute.”

This principle applies only where the relevant treaty or international rule establishes such an obligation.

7. Principle of Aut Dedere Aut Judicare

Under aut dedere aut judicare, a State may be required to either:

extradite the alleged offender

or

submit the case for prosecution before its own competent authorities.

It is particularly associated with certain international conventions concerning serious offences.

It is important to remember that this is not a universal rule applicable to every criminal offence.

8. Principle of Non-Refoulement

Extradition must comply with applicable non-refoulement obligations.

A State may be prohibited from surrendering a person where there are substantial grounds for believing that the person would face a prohibited risk in the requesting State.

This is particularly important where there is a risk of:

• persecution;
• torture;
• cruel, inhuman or degrading treatment;
• other serious human rights violations.

9. Prohibition of Torture

A person should not be extradited where surrender would expose them to a real or substantial risk of torture, where the applicable international obligations prohibit such transfer.

Article 3 of the Convention against Torture, 1984 is particularly important.

It prohibits extradition or return where there are substantial grounds for believing that the person would be in danger of being subjected to torture.

10. Protection Against Inhuman or Degrading Treatment

Human rights law may also prevent extradition where the person faces a serious risk of:

• inhuman treatment;
• degrading treatment;
• cruel treatment.

The leading authority is:

Soering v. United Kingdom (1989)

The European Court of Human Rights held that extradition may engage the responsibility of the requested State where surrender would expose the individual to a real risk of prohibited treatment.

11. Death Penalty Safeguard

Where the requesting State permits the death penalty but the requested State does not, extradition may be refused or made conditional upon assurances.

The requested State may require an assurance that:

• the death penalty will not be sought;
• the death penalty will not be imposed; or
• the death penalty will not be carried out.

The precise requirement depends upon applicable law.

12. Principle Against Double Jeopardy

The principle of ne bis in idem or protection against double jeopardy may prevent extradition where the person has already been finally prosecuted or punished for the same offence.

Thus:

Final prosecution/punishment

↓

Same offence

↓

Extradition may be refused

The precise scope depends upon the applicable treaty and domestic law.

13. Rule of Specialty and Identity of Offence

The offence specified in the extradition request must generally correspond to the offence for which the person is surrendered.

This protects the individual from being transferred under one allegation and then prosecuted for an entirely different offence.

14. Prima Facie Case / Evidentiary Requirement

Some extradition systems require the requesting State to provide sufficient evidence to establish a prima facie case.

Other modern extradition arrangements use different evidentiary standards and may rely more heavily on judicial warrants or formal charging documents.

Therefore, this principle is not uniform across all extradition systems.

15. Principle of Reciprocity

Extradition may operate on the basis of reciprocity, particularly where States cooperate without a comprehensive treaty.

A State may agree to surrender a person on the expectation that the other State will provide similar cooperation in appropriate circumstances.

Where a treaty exists, the treaty’s specific obligations control.

16. Principle of Specialty in Punishment

The rule of speciality also limits the punishment imposed after extradition.

The requesting State should generally remain within the scope of the extradition granted.

It cannot ordinarily use the person’s surrender to impose punishment for unrelated conduct.

17. Principle of Territorial Sovereignty

Extradition respects the sovereignty of the requested State.

A State cannot ordinarily enter another State’s territory and arrest a person without lawful authority.

Instead:

Person located in State B

↓

State A wants person

↓

State A requests extradition from State B

This distinguishes lawful extradition from unilateral abduction.

18. Principle of Judicial and Legal Process

Extradition must follow the procedures established by:

• domestic law;
• extradition treaties;
• applicable international obligations.

The person should receive the procedural protections provided by the relevant legal system.

19. Right to Fair Procedure

Extradition proceedings may involve judicial safeguards concerning:

• identity;
• legality of the request;
• evidence;
• applicable treaty;
• grounds for refusal;
• human rights concerns.

The precise safeguards vary between States.

20. Principle of Non-Discrimination

An extradition request should not be used as a means of discriminatory persecution.

Extradition may be refused where prosecution is genuinely motivated by discrimination based on factors such as:

• race;
• religion;
• nationality;
• political opinion.

The exact grounds depend upon the applicable treaty and human rights law.

21. Principle of Extradition for Extraditable Offences

Extradition is generally available only for offences that fall within the category of extraditable offences under the relevant treaty or domestic law.

Modern treaties often use a minimum punishment threshold rather than listing every offence individually.

22. Principle of Proportionality

In some legal systems, proportionality may be relevant when assessing extradition, particularly where the offence is relatively minor compared with the consequences of surrender.

Its application varies significantly between jurisdictions and treaties.

23. Principle of Identity of the Person

The requested State must be satisfied that the person arrested or sought is the same person named in the extradition request.

Identity verification is therefore an important procedural requirement.

24. Principle of Specialty in Subsequent Prosecution

If the requesting State wishes to prosecute the person for another offence after extradition, it generally needs to obtain the required consent or waiver according to the applicable treaty.

Thus:

Original extradition

↓

New offence

↓

Consent/waiver may be required

25. Principle of Good Faith

Extradition requests should be made and processed in good faith.

A State should not use extradition procedures as a disguise for:

• political persecution;
• unlawful detention;
• discriminatory prosecution;
• purposes unrelated to legitimate criminal justice.

Important Cases

Soering v. United Kingdom, 1989

Important for human-rights limitations on extradition, particularly the risk of inhuman or degrading treatment.

United States v. Alvarez-Machain, 1992

Important for the relationship between extradition arrangements and forcible abduction.

LaGrand, 2001

Important for consular notification and assistance to foreign nationals facing criminal proceedings.

Jadhav, 2019

Important for consular access and rights under the Vienna Convention on Consular Relations.

Major Principles at a Glance

Principle Core Rule Dual criminality Conduct generally criminal in both States Speciality Prosecution generally limited to extradited offence Political offence exception Political offences may be excluded Military offence exception Purely military offences may be excluded Fiscal offences Treatment depends on applicable law/treaty Non-extradition of nationals Some States prohibit extradition of nationals Aut dedere aut judicare Extradite or prosecute where required Non-refoulement Prohibits surrender in protected-risk situations Anti-torture rule No extradition to a substantial torture risk Death penalty safeguard Assurances may be required Double jeopardy Same offence may not be prosecuted twice Fair procedure Applicable procedural safeguards must be followed Reciprocity Cooperation may be based on reciprocal treatment Territorial sovereignty No unilateral cross-border arrest Non-discrimination No extradition for discriminatory persecution Extraditable offence Request must fall within applicable offence category Identity Person sought must be correctly identified Good faith Request must serve legitimate legal purposes

Quick Revision

• Dual criminality → offence must generally be criminal in both States.
• Speciality → prosecution generally limited to the offence for which extradition was granted.
• Political offence exception → traditional ground for refusal.
• Military offence exception → purely military offences may be excluded.
• Non-extradition of nationals → recognised in some domestic systems, not universal.
• Aut dedere aut judicare → extradite or prosecute, where an applicable rule requires it.
• Non-refoulement → prevents surrender where protected risks arise.
• Anti-torture principle → no extradition where applicable law prohibits transfer to a substantial torture risk.
• Death penalty → may require assurances.
• Ne bis in idem → protection against double prosecution.
• Territorial sovereignty → extradition must follow lawful inter-State procedures.
• Good faith → extradition should not be used for disguised political persecution.
• Soering (1989) → human-rights limitations on extradition.
• The essential principle is:

Extradition is governed by principles designed to ensure effective criminal cooperation while protecting State sovereignty and the fundamental rights of the person sought.

Conclusion

The principles governing extradition establish the legal framework within which one State may surrender a person to another State for criminal prosecution or enforcement of a sentence. Dual criminality and the rule of speciality are among the most important traditional principles, ensuring that extradition is available only for recognised criminal conduct and that the requesting State does not prosecute the person beyond the scope of the surrender. Other principles, such as the political offence exception, non-extradition of nationals, aut dedere aut judicare, non-refoulement and the prohibition of torture, address competing concerns of sovereignty and individual protection. Modern extradition law has increasingly incorporated human-rights safeguards, particularly concerning torture, inhuman treatment, discriminatory prosecution, fair procedure and the death penalty. The principle of territorial sovereignty also requires States to use lawful extradition procedures rather than unilateral cross-border arrests. The exact application of these principles varies according to the relevant treaty, domestic law and international obligations. Ultimately, extradition seeks to achieve a balance between preventing impunity for crime and protecting the sovereignty and fundamental rights of the person whose surrender is sought.