Important information

The API reference is now available here.
The deprecated API reference is available here.


TLS/SSL certificate update

February 21, 2022

Learn more about the TLS/SSL certificate updates.

We will update the SSL certificate for our payment system in March 2022. The new certificate will then be valid till March 22, 2023.

We will inform you in advance when to install the certificate and also send email updates regarding the same. Please do not replace the current certificate until then.

To replace the existing certificate, download the new one and follow the steps for updating it on your system.

This certificate is valid for the entire domain * and will be used on both the test and the live systems. It is already updated on the test system, so you can test it with the new certificate.

icon info
  • If the shop systems and web servers do not have the SSL certificate of the respective remote station stored, then no action is required.
  • However, if you check the SSL certificate of the payment system in your system, the new certificate must also be stored here.
  • You must also check other systems such as merchandise management and fulfillment that are connected to the Unzer system with regard to certificate validation.

If you have any further questions, please send an email to