Peer Review
The process by which states assess each other's compliance — and the structural reason that assessment rarely produces accountability.
Peer review is the mechanism by which member states of an international organisation or treaty framework evaluate each other’s compliance with shared obligations. Rather than oversight by an independent external body, states assess one another — typically through a structured process of self-reporting, document review, and country visits conducted by representatives of other member states.
The method is not arbitrary. It reflects the foundational principle of international law, sovereign equality: states do not submit to external supervision in the way domestic institutions might. Peer review offers a means of collective accountability that preserves that equality while creating at least formal pressure toward compliance.
The structural limitation is inherent. States reviewing their peers have their own compliance records, their own political relationships, and their own interest in a process that does not set uncomfortable precedents. The UNCAC Implementation Review Mechanism operates on this model — states review each other under confidentiality provisions, with no independent verification of findings and no enforcement mechanism for non-compliance. The review exists. The accountability it produces is a separate question.
See also: Sovereignty. Reciprocity. FATF.
Source: United Nations Convention against Corruption, opened for signature 9 December 2003, 2349 UNTS 41 (entered into force 14 December 2005) arts 63–64; Conference of the States Parties to UNCAC, Terms of Reference of the Implementation Review Mechanism, Resolution 3/1 (2009).