In international law, restitution is the primary form of reparation a wrongdoing state owes after committing an internationally wrongful act. It is codified in Article 35 of the International Law Commission's Articles on Responsibility of States for Internationally Wrongful Acts (ARSIWA, 2001), which obligates a responsible state to "re-establish the situation which existed before the wrongful act was committed," provided this is not materially impossible and does not impose a burden out of proportion to the benefit gained over compensation.
Restitution can be material (returning territory, persons, property, or documents) or juridical (revoking an unlawful legislative or judicial act). The classic statement comes from the Permanent Court of International Justice in the Factory at Chorzów case (Germany v. Poland, 1928), where the Court held that reparation must "as far as possible, wipe out all the consequences of the illegal act and re-establish the situation which would, in all probability, have existed if that act had not been committed." Where restitution is impossible, the responsible state must pay compensation (ARSIWA Art. 36); where neither suffices, satisfaction (Art. 37) — such as an apology or formal acknowledgement — may be owed.
Concrete applications include:
- Cultural property restitution under the 1970 UNESCO Convention on the Means of Prohibiting and Preventing the Illicit Import, Export and Transfer of Ownership of Cultural Property, and the 1995 UNIDROIT Convention on Stolen or Illegally Exported Cultural Objects.
- Holocaust-era asset restitution, addressed in the non-binding 1998 Washington Principles on Nazi-Confiscated Art.
- Territorial restitution, as ordered by the ICJ in Temple of Preah Vihear (Cambodia v. Thailand, 1962), which required Thailand to withdraw forces and return objects removed from the temple.
- Release of detained persons, ordered in LaGrand (Germany v. United States, 2001) and Avena (Mexico v. United States, 2004) through review and reconsideration of convictions.
Restitution is distinct from restitutio in integrum in private law, though the underlying logic — restoring the status quo ante — is shared.
Example
In the 2004 Avena judgment, the ICJ ordered the United States to provide review and reconsideration of the convictions of 51 Mexican nationals as a form of restitution for breaches of the Vienna Convention on Consular Relations.
Frequently asked questions
Restitution restores the original situation in kind (e.g., returning territory or property), while compensation pays money for damage that restitution cannot repair. Under ARSIWA, restitution takes priority where feasible.
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