Convention Against Corruption Definition

Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

The UN Convention Against Corruption (UNCAC) is a global treaty obliging states to prevent, criminalize, and cooperate against corruption in public and private sectors.
When did UNCAC enter into force?
What is the Implementation Review Mechanism?
How does UNCAC differ from the OECD Anti-Bribery Convention?

Updated June 22, 2026

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Timeline

31 October 2003
The United Nations Convention Against Corruption (UNCAC) was adopted by the UN General Assembly on (resolution 58/4) and opened for signature in Mérida, Mex…
14 December 2005
It entered into force on and is the only legally binding universal anti-corruption instrument.

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In 2020, Switzerland returned roughly USD 300 million in Sani Abacha–era assets to Nigeria under a trilateral agreement citing UNCAC Chapter V principles on asset recovery.

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Research it like a delegate

The United Nations Convention Against Corruption (UNCAC) was adopted by the UN General Assembly on 31 October 2003 (resolution 58/4) and opened for signature in Mérida, Mexico in December 2003. It entered into force on 14 December 2005 and is the only legally binding universal anti-corruption instrument. The treaty is administered by the United Nations Office on Drugs and Crime (UNODC) in Vienna.

UNCAC is organized around five substantive pillars:

Prevention (Chapter II): public sector integrity, codes of conduct, transparent procurement, and measures involving the private sector and civil society.
Criminalization and law enforcement (Chapter III): mandatory and optional offenses including bribery of national and foreign public officials, embezzlement, trading in influence, abuse of functions, illicit enrichment, money laundering, and obstruction of justice.
International cooperation (Chapter IV): extradition, mutual legal assistance, and joint investigations.
Asset recovery (Chapter V): often called the treaty's "fundamental principle" (Article 51), establishing mechanisms to return stolen assets to countries of origin.
Technical assistance and information exchange (Chapter VI).

Implementation is reviewed through the Implementation Review Mechanism, established by the Conference of the States Parties in 2009 (resolution 3/1) at its Doha session. Each state party undergoes peer review by two other parties in two cycles: the first covering Chapters III and IV, the second covering Chapters II and V.

UNCAC complements regional instruments such as the OECD Anti-Bribery Convention (1997), the Inter-American Convention Against Corruption (1996), and the African Union Convention on Preventing and Combating Corruption (2003). With near-universal participation—well over 180 states parties—it is one of the most widely ratified UN treaties, though notable holdouts and uneven enforcement remain ongoing concerns flagged by Transparency International and other monitoring bodies.

Frequently asked questions

When did UNCAC enter into force?

It entered into force on 14 December 2005, ninety days after the thirtieth instrument of ratification was deposited.

What is the Implementation Review Mechanism?

A peer-review process established in 2009 in which each state party is reviewed by two others across two cycles covering prevention, criminalization, international cooperation, and asset recovery.

How does UNCAC differ from the OECD Anti-Bribery Convention?

UNCAC is universal and covers a broad range of corruption offenses including asset recovery, while the OECD instrument is limited to OECD members and adherents and focuses narrowly on bribery of foreign public officials in international business.