How can I avoid marketing calls?

You can do this by putting an asterisk next to your basic data in the Swisscom Directories Ltd public directory as well as after the additional contacts added to your listing at ZIP.ch.
To add an asterisk to your basic data, send an e-mail to this address. To add an asterisk to contacts specifically added on your ZIP.ch listing, go to its editing form (My Accounts - My listings, click Edit). For more information concerning marketing calls, consult this FAQ.