While governments have a role to play in setting the regulatory and legal landscape to fight proliferation finance, they need the cooperation of the private sector to achieve an effective global counterproliferation finance framework. Thus the private sector, including financial institutions, has an essential role in identifying activities that may be suspicious, alerting relevant authorities, freezing assets and implementing financial sanctions. This guide is designed to provide multi-jurisdictional support to the private sector in identifying activities that may be higher risk, determining the levels of risks the sector faces, and developing strategies to tackle such risks.