A range of different monitoring and follow-up processes are currently in operation in connection with several of the conventions. To different degrees they involve review of country performance in line with anti-corruption instruments, development of a common understanding of the standards set in the respective instruments and assistance to countries facing difficulties with implementation.

Intergovernmental monitoring systems currently exist for the following conventions that have entered into force, as well as for other instruments. They are listed roughly in order of their effectiveness with respect to the review of anti-corruption instruments:

• OECD Convention and other OECD instruments - OECD Working Group on Bribery monitoring - the most vigorous review process
• Council of Europe Conventions and other instruments - GRECO monitoring - a strong review process
• OAS Convention - Follow-up Mechanism - a moderate review process
• African Union Convention and UNCAC - NEPAD’s African Peer Review Mechanism - a limited review using standards of conventions not yet in force
• ADB-OECD Action Plan - Evaluation Process - a soft review process of a non-binding instrument

Furthermore, the following review mechanisms are foreseen but are not yet operative because the relevant instruments have not yet entered into force:

• African Union Convention - Follow Up Mechanism
• SADC Protocol - Committee of State Parties
• UN Convention against Corruption - Mechanisms for Implementation

No monitoring system is in place or planned for the EU Conventions, although these have entered into force.