Expiration of TLS certificate in Croatia

The validity of the server certificate of the Tax Administration, cis.porezna-uprava.hr, which is used in the production environment of the fiscalization system, will expire in March 2024. The new server certificate will be implemented on the side of the Tax Administration system on Monday, March 11, 2024, around 05:00. What taxpayers need to do is explained below.

Taxpayers will be able to start downloading the public key of the new certificate even before its replacement on February 20, 2024, through the FINA certificate search engine (http://rdc.fina.hr/certificate-search/) or on the website of the Tax Administration.

We recommend taxpayers contact the manufacturer or maintainer of the software solution for fiscalization they use and/or their IT support for assistance in downloading and storing the public key of the server certificate, because otherwise, after replacing the certificate on the Central Server of the Tax Administration, the fiscalization of their accounts will be questionable.

Before the server certificate of the production system expires, the server certificate of the fiscalization test system cistest.apis-it.hr will be renewed on February 19, 2024, at around 3:00 p.m., where the upcoming change will be able to be tested. A new fiscalization test system certificate will be issued by Fina Demo CA in 2020.

During the implementation of the new server certificate cis.porezna-uprava.hr on Monday, March 11, 2024, around 05:00 a.m. in the production environment of the fiscalization service, support for the TLS v1.3 encryption protocol will be introduced on the CIS side of the Tax Administration, and from then on, TLS v1.1, v1.2, and v1.3 will be supported in the production environment of the service encryption protocols. If user solutions are connected to the fiscalization service using the predefined largest available cryptographic algorithm, this will require adaptation in part of the older user solutions in such a way that a certain cryptographic algorithm is forced into them when connecting to the CIS of the Tax Administration.

You can ask additional questions about downloading the certificate to the e-mail address: certificati-fiskalizacija@fina.hr.

Questions about technical support related to connecting to the CIS of the Tax Administration can be sent to the e-mail address: fiskalizacija.help@apis-it.hr.