This page is used to provide stakeholders working on the implementation of the once-only technical system (OOTS) with links to the latest prototypes developed by the UX team at the European Commission.
The prototypes have been developed to show what the user experience might look like – each Member State will have their own considerations.
As we move forward, we will be refining our prototypes based on user testing and creating UX guidance for teams working on the implementation of the OOTS.
If you already have an account on the Commission wiki for once-only you will get a notification when we publish an update. If you don’t yet have an account and wish to sign up, you can make a request through the once-only section of our service desk.