The QR code contains all the information that you can see on your COVID certificate in paper form. It also contains an electronic signature which can check the authenticity of the COVID certificate. This makes it forgery-proof. The Swiss verification keys, which enable the authenticity check, are exchanged with all countries participating in the system via the so-called EU Gateway. This way, all EU-compatible COVID certificates issued in Switzerland can also be checked for authenticity abroad.
Please note: The QR code used for your COVID certificate has limited technical validity. and has to be renewed after a certain period of time. If your certificate’s QR code has to be renewed, you will be reminded in the COVID Certificate app.
Find out why you should renew the QR code in the FAQ: Why should I renew the QR code of my COVID certificate even though the certificate is about to expire or has already expired under the Swiss validity rules?