This document discusses mobile money regulation and interoperability. It notes that interoperability is primarily a regulatory issue and provides advantages like cost effectiveness, consumer convenience, and sustainability. The document contrasts interoperable systems, which regulators promote, with exclusive systems operated in silos that are not sustainable. It emphasizes the role of national regulators in proportionate oversight and continuous policy dialogue to support development. Finally, it addresses the importance of service level agreements, consumer protection from risks like fraud, and keeping regulators informed through ongoing communication.