User journeyKey steps in the once only journey
An overview of the seven steps in the Once-Only Technical System (OOTS) journey.
6.Evidence Response
6. Confirm use of evidence
The evidence provider responds to the evidence request
Evidence provider sends the evidence
In response to the second request message from the procedure portal, the evidence provider returns a response containing the evidence (if the user decided to use the evidence) or an error (in case the user decides not to use the evidence, if the evidence cannot be located or if the provider cannot match the user's identity).
The structure of the evidence response
To be automatically exchanged via the Once-Only Technical System, an evidence must be supplemented by the metadata elements of the Once-Only Technical System generic metadata model, which uniquely identifies the evidence and the evidence provider along with other additional and optional fields such as the language in which the evidence is issued. The evidence itself must be in one of three formats:
- Evidence that is in a human readable format (e.g., a PDF)
- Structured evidence that complies with an Once-Only Technical System data model relevant for the evidence type
- Structured evidence that does not comply with any Once-Only Technical System" data model must be accompanied by a human-readable version of the evidence (e.g., a PDF)
User retrieves other evidences
If the user wants to retrieve evidences from different Member States or if Member States have multiple preview areas, the user must repeat the steps ‘redirect’ and ‘preview’ for each evidence.
Understand how the Once-Only Technical System connects public authorities so that they can exchange evidence at the request of a citizen or business, by navigating our prototype.
