Federal Office of Information Technology, Systems and Telecommunication (FOITT) (for governmental authorities only, exclusively with class A certificates): Swiss Government PKI (admin.ch)
According to Article 14 para. 2bis of the Swiss Code of Obligations, a qualified electronic signature is equivalent to a handwritten signature. What constitutes a qualified electronic signature is governed by the Federal Act on Electronic Signatures (ESigA). The Swiss Accreditation Service (SAS) publishes a list of the recognised certification services.