This paper makes several contributions.First, it presents a ‘guidance note’ on the framework forSocial Registries, anchoring the definition of these systemsin their functions along the Delivery Chain and their socialpolicy role as inclusion systems, while clarifyingterminology in a manner that is consistent with IT standardsin the discussion of their architecture as informationsystems. Second, it illustrates the diverse typologies andtrajectories of country experiences with Social Registrieswith respect to their (a) institutional arrangements(central and local); (b) use as inclusion systems (coverage,single or multi-program use, static or dynamic intake andregistration); and (c) structure as information systems(structure of data management; degree and us ofinteroperability with other systems). These patternsprimarily derive from a review of Social Registries in asample of 20 countries), (Azerbaijan, Brazil, Chile, China,Colombia, the Dominican Republic, Djibouti, Georgia,Indonesia, Macedonia, Mali, Mauritius, Mexico, Montenegro,Pakistan, the Philippines, Senegal, Sierra Leone, Turkey,and Yemen). The paper also draws on experience in othercountries (Kenya, Rwanda, Nigeria, Egypt, Jordan, Vietnam,India, Estonia, Belgium, the US, Canada, Australia, andothers) to illustrate specific points. Third, this paperdevelops a basic ‘Assessment Tool’ covering the corebuilding blocks of Social Registries using a ‘checklist’style of questions. Given the wide diversity of SocialRegistries in both their role in social policy and in theirarchitecture, the approach is not prescriptive: it does notadvocate for any specific model or blueprint for SocialRegistries. Any diagnostics or recommendations that emergefrom use of this Guidance Note and Assessment Tool will becountry specific. Some key take-away messages include: (a)the importance of recognizing both the role of the ‘frontlines’ for outreach, intake and registration (SocialRegistries as inclusion systems) and the ‘back office’functions of Social Registries as information systems; (b)the potential power of Social Registries as integrated anddynamic gateways for inclusion; (c) the recognition thatSocial Registries are generally part of end-to-end systemsfor specific programs, integrated social protectioninformation systems, and/or even ‘whole-of-government’approaches; and (d) there is significant diversity in thetypology and trajectories of Social Registries acrosscountries and over time.