====== Renewal of personal certificate issued by CESNET CA4 ======

===== Requirements =====
The following conditions must be met to renew a personal certificate in accordance with these instructions:

  - You have a **valid personal certificate** issued by CESNET CA4 and you have the appropriate private key. If this is not the case, it is necessary to partially [[cs:st-user-lost4.html|repeat the registration process]].
  - The new certificate should have the **same content** as the existing certificate. If you require a certificate with a different content, follow the instructions in Changing the certificate content.

===== Send request =====

=== If you have an email notifying you that the certificate is about to expire ===

Reply to this email. Usually, just press the //Reply// in your mail client and send the mail. Make sure that you have signed your email with your CESNET CA 4 certificate and that the original notification text, or at least the serial number line, has been retained in your reply:

<file>
...
and Serial Number: XX: XX: XX: XX: ...
...</file>


=== If you don't have an email ===
Send a signed email to ra@cesnet.cz containing a certificate renewal request with the text:

<file>Requesting renewal of personal certificate
with serial number: XX: XX: XX: XX: ...</file>

The serial number must be in hexadecimal format with colons (see [[en:cert-serial-how.html|How to find the serial number of the certificate]]). Make sure you have signed your email with your CESNET CA4 certificate.


===== Generate a certificate =====
Your signature will be verified and then you will receive your activation data for the certificate generator.