The European Commission published recently a new document promoting the integration of social services in Europe. It presents the benefits of implementing “one-stop-shops” in order to improve the coordination between unemployment policies and social service delivery. “Literature review and identification of best practices on integrated social service delivery” is part of the European Commission’s Social Investment Package (SIP) for modernizing social models of the Member States. The document is composed by 2 parts. The first one presents the literature review on the subject and some recommendations for the design of integrated services. The second part presents some examples of social service integration in 9 Member States, with 4 cases of vertical integration reforms (different level of government) in Denmark, Germany, Poland and Italy. And 5 cases of horizontal integration (linking services provided by separated entities) in Austria, Estonia, Finland, Germany and Norway.