Question:

Define dual criminality and speciality.

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Dual criminality protects the \textbf{decision to extradite}. Speciality protects the \textbf{treatment after extradition}. Both prevent abuse and preserve sovereignty.
Updated On: Jul 10, 2026
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1. Dual Criminality
Dual criminality is a foundational principle of extradition law. It means:
The conduct for which extradition is sought must constitute a criminal offence in both the requesting and the requested State.
Key features:

The name or statutory classification of the offence need not be identical.
What matters is the substance of the conduct (e.g., intentional killing, fraud, bribery).
Ensures fairness and prevents surrender for conduct that is not criminal domestically.
It protects individuals from being extradited for acts that are lawful or morally neutral under the domestic law of the requested State.
2. Principle of Speciality
The specialty rule provides that:
A person extradited for one offence can be tried, punished, or detained only for that specific offence, unless:
(1) the requested State consents to additional charges, or
(2) the accused voluntarily stays in the requesting State beyond a certain period.

Purpose:

Prevents misuse of extradition as a pretext for unrelated prosecution.
Protects diplomatic trust and individual fairness.
Ensures the requesting State honours the limits of the extradition grant.
\[ \boxed{\text{Dual criminality = what conduct must match.}} \] \[ \boxed{\text{Speciality = how the requesting State may use the fugitive after surrender.}} \]
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Approach Solution -2

Both dual criminality and speciality are easiest to see through what actually happens to one fugitive as they move through the extradition process.

Suppose State A asks India to extradite a person for a certain act.
Before India even considers surrender, it asks a threshold question: is that act a crime under Indian law too, even if it carries a different name or falls under a different statute there? This is dual criminality. The label given to the offence in State A's penal code does not matter. What matters is whether the underlying conduct, say intentionally causing death or taking a bribe, is treated as criminal here as well. If Indian law does not criminalise the conduct at all, extradition fails at this first gate, no matter what the treaty says.

Suppose the person clears that gate and is surrendered.
A second, separate question now arises: can State A, having got its fugitive back, put them on trial for something else entirely, an old unrelated charge it had been holding onto? The principle of speciality says no. The person may be tried, punished or detained only for the offence for which they were extradited, unless India specifically consents to additional charges, or the person, once free to go, chooses to remain in State A beyond the period allowed for leaving.

Where each principle sits in the timeline.
Dual criminality operates at the gate, before surrender, deciding whether extradition can happen at all. Speciality operates after surrender, restricting what the requesting State can do with the person once it actually has them.

Read together, one rule decides whether the door opens, and the other rule controls what can be done once someone has walked through it. \[ \boxed{\text{Dual criminality gates entry into extradition; speciality restricts use of the fugitive after surrender.}} \]

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