Question:medium

Dual criminality prevents:

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Crime must exist in both jurisdictions.
Updated On: Jun 5, 2026
  • Double jeopardy
  • Arbitrary detention
  • Ex post facto criminalization
  • Excessive punishment
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The Correct Option is C

Solution and Explanation

Step 1: Understand dual criminality.
This rule says the act must be a crime in both the requesting and the requested country before extradition.

Step 2: See the effect.
It ensures legal symmetry and stops a person being punished for something that was not a crime where they were.

Step 3: Identify what it prevents.
It blocks ex post facto, or retroactive, criminalization.

Step 4: Rule out the others.
It is not directly about double jeopardy, arbitrary detention or excessive punishment.

Answer: Ex post facto criminalization (Option 3).
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