1) Documents from DG Comp: Since 17 May 2013, an exchange of notes between the Swiss Federal Council and the European Commission addresses the issue of notification of acts of public authority in the area of competition policy (see https://www.fedlex.admin.ch/eli/cc/2013/460/de). An act of public authority is understood to be any decision involving the imposition of sanctions, requiring or prohibiting a conduct, or a decision requiring the submission of information on the part of the addresses. Notification of such acts cannot be given directly by the European Commission to companies located in Switzerland. They must be addressed to COMCO, which then notifies the companies concerned. By means of this exchange of notes, the Swiss Federal Council authorised notification of these acts in Switzerland via the COMCO, within the meaning of Art. 271 of the Swiss Criminal Code (SCC) (unlawful activities on behalf of a foreign state).  Moreover, the European Commission may give direct notification of acts not relating to public authority to companies located in Switzerland. They are not subject to authorisation under Art. 271 SCC.  Therefore, if questionnaires from the European Commission are not mandatory for companies located in Switzerland, that is, if the companies are not penalised by the EU for failing to respond, they are not considered acts of public authority and responding to them does not require the authorisation of the EAER under Art. 271 SCC (see Explanatory Note on Questionnaires sent by the European Commission to Swiss companies (available at https://www.weko.admin.ch/weko/en/home/rechtliches_dokumentation/communications.html). 2) Documents from other competition authorities: Switzerland is a contracting state of the European Convention on the Service Abroad of Documents relating to Administrative Matters (ETS No. 094). Thus, the competition authorities of the other contracting states of this Convention have to request for service to the central authority when they address an act of public authority to a company in Switzerland.  The central authority is the Federal Office of Justice, 3003 Berne, Switzerland.