All modifications to the domain (DNS, contact changes, etc.) must be confirmed by the registrant, either by replying to a confirmation email from the registry or by sending a fax on company letterhead.
Registration details can be found in the TLD reference chart.
By default, .CH domains are autorenewed; to cancel autorenew, you must delete the domain 30 days before the expiry date.
When a .CH domain is transferred to OpenSRS, there is no change to the expiry date. Renewal occurs at the end of the existing term, within 5 days after expiration. The cost of the renewal is charged once the transfer completes. Registrar transfers require an authorization code. The registrant can obtain this code from the either SWITCH or, if applicable, the partner of SWITCH where they are currently registered. The code can be entered in the SRS Order Notes.
If you need the Authcode for a .CH domain that is registered with OpenSRS, email email@example.com.
For more information on transfers, see "Transferring domains and changing domain ownership"