Sternchenvermerk (Swiss Asterisk Mark)
A Swiss telephone-directory asterisk (*) that signals refusal of certain unsolicited commercial calls under the Unfair Competition Act.
Full definition
In Switzerland, Article 3(1)(u) of the Federal Act Against Unfair Competition (UWG / LCD) treats it as unfair to disregard a telephone-directory star mark indicating that the customer does not want advertising messages from businesses with which they have no relationship and that their data must not be shared for direct marketing. Commercial calls can still be permitted in some existing-customer situations, and the official guidance warns that the mark is not complete technical protection. It works alongside revDSG rights and directory suppression.
Source: SECO: Unsolicited advertising calls and the asterisk (German)
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