Information on how to upload supporting documents in the Single Candidate Portal is available at How to set up your profile and your CV (in particular fig. 4, 6 and 8). All supporting documents must be attached to the CV (and not the application) in your Single Candidate Portal profile at the latest by the deadline mentioned in the Notice of Competition. 

Details on the supporting documents to be uploaded can be found in the General Rules governing open competitions attached to the Notice of Competition. 

For more information please read: Which supporting documents should I provide? 

Should you also have an EPSO Account, please note that no documents should be uploaded and linked in your EPSO Account.