Find Comodo Root and Intermediate Certificates

Mark Berry February 6, 2017

Finding Comodo root and intermediate certificates can be a challenge. If you start with Google, you might find a promising knowledge base article with a direct link, but then be unable to find the certificates behind your certificate.

It seems the trick is to start with this “master page” of Root & Intermediate(s):

https://support.comodo.com/index.php?/Default/Knowledgebase/List/Index/71

Unless your cert is very old (unlikely), check out the left-hand, SHA-2 column:

Comodo certificates 1

Click on each certificate and try to match the serial number to the certificate in your chain. Here’s the serial number as shown in Firefox:

Comodo certificates 2


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