E-mail certificates

PostFinance signs all its outgoing e-mails with a digital signature. As a recipient, you can use this signature to check that the e-mail has genuinely been sent by PostFinance and that the message text has not been altered.

Why are signed e-mails a guarantee of security?

A digital signature serves the same purpose as a signature. It confirms that the signed e-mail has been sent by PostFinance and that it has not been altered at all after being sent.

PostFinance only sends digitally signed e-mails. Most e-mail clients (Outlook, Thunderbird, Windows Mail, Mail.app) support digital signatures and represent them showing a seal, a sealed envelope or a tick. You can obtain further information about the signature by clicking on the relevant symbol.

Check security

If you receive an e-mail that is allegedly from PostFinance, you should check its signature. PostFinance only sends digitally signed e-mails. If you have received an unsigned e-mail claiming to be from PostFinance, please contact our Online Contact Center:

Tel.: 0848 880 044
International: +41 848 880 044

Fingerprints for PostFinance newsletters

PostFinance newsletters are signed with a certificate that can be checked as follows:

  • For newsletters sent after 11 July 2013: Certificates are issued for newsletter@postfinance.ch, are valid from 11.07.2013 - 11.07.2015 and their fingerprint is
    f8 da 9e fb b3 38 9c 05 42 2f f2 67 96 5c b2 19 86 5e 6a af.
  • For newsletters sent between November 2012 and 11 July 2013: Certificates are issued for newsletter@postfinance.ch, are valid from 27.10.2012 - 27.10.2014 and their fingerprint is
    3a cd a3 70 02 7d c0 d9 f6 e5 4b b4 3a 4d f0 e3 0c 55 a9 3c.