If you do not wish to renew a certificate, you can set it to 'Let Expire'.
NOTE: This article only applies to professionally-signed SSL certificates purchased through Comodo.
- Navigate to the (Panel > 'Domains' > 'Secure Hosting') page.
- Click the Settings button to the right of the domain.
- On this page click the Let Expire button.
When the term for the certificate has expired your website will no longer show a secure lock when visiting HTTPS. Only expire a certificate if you no longer need to secure your website.