ul migration platform (conveniently called ImmigrationPolicy2.0 platform), enabling users (i.e., policy makers, politicians, decision makers, citizens) to identify, model, visualize, analyze, and evaluate national migration policies and practices, as well as to monitor and accordingly harmonize their procedures and data formats related to civil status documents, such as residence permits/certificates, work permits, civil status certificates, and family unification certificates, among others. The core platform provides a single point of access to all aforementioned services and its integration is based on advanced Web2.0 awareness components (e.g., mash- ups, portlets), SOA artifacts (e.g., Web Services, Enterprise Service Bus), semantic components [12], and rule/inference engines. The rest of this chapter is organized as follows: Section 14.2 provides back- ground for the motivation and outcomes of this work. Section 14.3 presents the proposed immigration user-centric collaborative services (ImmigrationPolicy2.0 services) as well as the required core design principles that have been properly addressed. Section 14.4 describes the ImmigrationPolicy2.0 platform and its basic components. Finally, Section 14.5 draws conclusions. 14.2 Rationale For more than 20 years (from the Maastricht Treaty, 1986, to the Treaty of Amsterdam in force since 1999), the Member States have joined forces to combat international phenomena, such as illegal immigration, while promoting the idea of a single European region. On the other hand, legal, political, technological, and societal differences in the Member States as well as the isolation of legal immigrants from the decision-making processes and the formulation of balanced migration proposals, are the main causes blocking the adoption of a common, acceptable, and applicable pan-European migration policy. Recently, several projects have been launched to research and elaborate on the existing problematic situation, while the implementation and adoption of Migration Information Systems i