The Once - Only Principle for Europe Conference is now open for registration!


The event will host speakers from European Commission, experts from TOOP and SCOOP4C projects

as well as a range of stakeholders, including representatives of the countries, which are already

working on the initial implementation of the OOP. During the first day of the conference, SCOOP4C

and TOOP will present the main achievements of the projects; conference participants will be able to

participate in a world café session and discuss the most relevant topics concerning the impact of the

OOP on the Digital Single Market.


The second day will focus on high-level discussions of the OOP environment in the European Union.

Relations to the Single Digital Gateway Regulation and the impact of the General Data Protection

Regulation will be discussed. A number of case studies of OOP implementation within and outside of

the EU will also be presented, followed by a panel discussion on the impact of OOP in the EU.


The aim of the conference is to promote the Once -Only Principle, present the achievements of the

projects and explain how the implementation of the principle will benefit to all participants of the

European Digital Single Market. The core idea of the OOP is that e-service users will be providing data

to public administrations only once. The data then is safely stored and exchanged between various

authorities in different countries, resulting in streamlined provision of digital public services across

borders. This will make life of European businesses and citizens easier, as well as reduce costs for

public administrations.


The event is co-organised by two projects: TOOP and SCOOP4C, which are striving to explore and

demonstrate the Once-Only Principle across borders from two perspectives: businesses and public

administrations (TOOP) as well as European citizens (SCOOP4C).


Conference participation is free of charge but registration is required.


To register to the conference, please visit:


For updates on the Once Only For Europe Conference visit:, and  follow us on social media channels.


TOOP: Twitter, Facebook, LinkedIn


SCOOP4C: Twitter, Facebook, LinkedIn


For any questions / requests, please contact us at:


Contact email
Physical location
The Austrian Federal Computing Centre
Hintere Zollamtsstraße 4
1030 Vienna
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