Reissuing an SSL certificate is the process of replacing an issued certificate by a new one with changed data. Reissue should be done when you need to change CSR data (for example, if you lost your private keys or they were compromised) or you want to change the list of additional domains. Reissue will not extend the validity period of your certificate and it's free of charge if no additional domains are added. Click 'Reissue' in the actions block. Please note that reissue in the ssl panel is used only for single domain certificates. If you want to reissue a multidomain certificate, you'll be redirected to RCP. After clicking 'Reissue' we can reselect ‘requestor’ and make changes to the CSR. Please note that you will need to replace your private keys if you change theCSR. When the request is submitted you will notice a new tab with “reissue requested” and the current active certificate will be moved to the tab '1' in the certificate history block. Domain validation required. We use email validation, so we need to confirm domain ownership by following the link received by email. Once the reissue is finished, you will see the new certificate become active in the current tab and the old one will be marked as 'replaced'. That’s done. Now you can download and install your updated certificate.