As part of the process, CH-REP is responsible for verifying that a medical device complies with Swiss regulations. This is a necessary step before a medical device can enter the Swiss market. Since the CH-REP is responsible for the safety aspects of the medical device, it must review the documentation.
With that said, only the Swiss manufacturer, Swiss authorized representative (CH-REP), CH importer are required to register with Swissmedic. After registration, a CHRN is issued (as SRN in EUDAMED). Once registered with Swissmedic, the Swiss authorized representative acts in Switzerland on behalf of the manufacturer.