The Committee on Payments and Market Infrastructures (formerly the Committee on Payments and Settlement Systems) is a Committee that sits under the Bank for International Settlements and exists to promote the safety and efficiency of payment, clearing and settlement thereby supporting financial stability and the wider economy.
Its membership consists of Central Banks, the latest membership of which can be found HERE and operates under a charter which can be accessed HERE. The CPMI is a member of the Financial Stability Board.
It’s main relevance to the day to day world of Payment Systems and Settlement is that, in 2012, the CPMI published what are known as the “Principles for Financial Market Infrastructures”. For those jurisdictions that participate in the CPMI, it is expected that key Payment and Settlement systems will both adopt and measure their compliance against the Core Principles. It normally falls to the relevant Central Bank to monitor and measure adherence to this.
Since that point, the CPMI have published a series of associated documents (some of which are linked to below)