The main objective of the SCOOP4C project is to build up and sustain a stakeholder community that will discuss and share experiences of once-only principle implementations for citizens. The community brings forward issues of concern as well as key enablers for OOP4C implementations. The SCOOP4C community consists of expert representatives of public administrations, consultation and service providers to governments (private sector and third sector), non-governmental organizations, civil sector actors, and academia across Europe. All community members study and engage in the administrative burden reduction through data sharing in governments or tackle related issues of particular concern such as data protection, privacy, and the control/consent of citizens.