Various use cases are being tested in the cities of Leipzig and Dresden. These include digitizing the process of moving within as well as moving into the city. This means that a personal presentation at the citizens' office for a Re-registration process with a verified digital identity will no longer be necessary. But not only the re-registration, also the digital application and the issuance of digital documents and authorizations, such as ID cards, Market stand registration, Library card, Dresden passport or Leipzig App, are to be made accessible in an ID ideal-compatible manner. The existing eID functions of the ID card and eIDAS compliance will be integrated. In addition, integration in citizen participation processes, e.g. participation portal and citizen's decision is being tested, with the use of the Free State of Saxony's citizen participation portal to enable citizen participation via the ID ecosystem in other municipalities as well. Furthermore grant applications in fully electronic form included digital verification of the information provided by the applicant are offered.