Principle 6 User-centricity
Use multiple channels to provide the European public service, to ensure that users can select the channel that best suits their needs.
Provide a single point of contact in order to hide internal administrative complexity and facilitate users' access to European public services.
Put in place mechanisms to involve users in analysis, design, assessment and further development of European public services.
As far as possible under the legislation in force, ask users of European public services once-only and relevant-only information.