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Electronic signature (e-certificate)


Electronic signature (e-certificate)

Phishing-e-mails are special spam e-mails that look apparently genuine and are used by criminals to attempt to trick customers into revealing their passwords, PINs, bank account information or credit card details.

To combat phishing, Swisscom is launching an electronic e-mail signature for Swisscom bills. The signature will be used like a digital signature and will allow customers to check whether an e-mail has actually been sent by Swisscom.

Following the launch of e-certificate, the e-mails you receive with your Swisscom bills will now contain the following information:

  • Digital signature as a second attachment
  • You will also find the following additional note in the e-mail:
    This e-mail from Swisscom has been signed.
  • Never give your security details to third parties.

The way in which the results of the certificate check and the certificate itself are displayed will depend on the e-mail software and operating system you use.

Examples of valid certificates in various e-mail clients:

Apple Mail

Apple Mail

Microsoft Outlook

Microsoft Outlook



For more detailed information please consult the manual for your e-mail software and read the information provided by the government at


The sub-domain is also being changed with the launch of the digital signature:

  • Previously:
  • With new e-certificate:

The electronic signature will be introduced automatically over the next few months.  You do not need to do anything and can continue to use the electronic bill service as normal.


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