The best know-how in one place
We will guide you through the digital world. Expertly and clearly
We have been working on electronic signing for almost a quarter of a century. We understand the overall concept and know the finer technological details. We don't keep our know-how to ourselves.
We advise, solve, add a good dose of inspiration for digitalization
FAQ, frequently asked questions
Answers to questions that are repeated in customer and technical support.
Videos and instructions for obtaining certificates
How to get a certificate, how to use it, and how to work with time stamps and other services.
Download from us what you are missing
Reader software, smart card management applications and other downloadable items.
Detailed description of the I.CA solution
Documents that define how certificates are issued and used.
References to legislation
Here you will find the current legislation.
We are here for you on weekdays from 8 am to 5 pm
Support you can
rely on
We write about electronic signing and everything related to it. In human terms
We clearly answer the questions you may have too
I have changed my residence, company address, name... How can I reflect the changes on my existing certificate?
If any of the information on the certificate has changed, a new certificate must be issued. It is not possible to change the entries in the certificate.
Can I have multiple personal certificates?
The number of certificates is not limited, so a natural/legal person can own an unlimited number of issued certificates.
How to invalidate a certificate?
The procedures for certificate invalidation are defined in the I.CA certification policy:
- By submitting the request electronically - via the web form .
- By sending an electronically signed message to revoke@ica.cz
- By personal delivery of the request to the RA
- By mail
How to install the certificate?
To install your personal certificate (the public part of the certificate), use the email we sent you or the certificate file in DER format (this format was sent to your email inbox when the certificate was issued, or you can look it up on the list of public certificates).
What documents can be used when issuing a certificate online using ZealID?
A valid ID card or passport is required to obtain a certificate. The ZealID application that is used to identify a person supports documents issued by countries that can be found on the ZealID website in the list of supported documents.
Tutorials
