If you are using the shared SSL certificate or a dedicated certificate that you purchased from us or Comodo directly, you are able to use the Comodo TrustLogo. For instructions on installing your TrustLogo, please see:
Instructions for Comodo Trustlogo Use (note: this link jumps to the Comodo site)
Please note that this certificate will only work with Comodo SSL certificates, and will only validate when shown on the URL where the certificate is installed. For instance, if your SSL certificate is under secure.yourdomain.com and you go to www.yourdomain.com, the TrustLogo will not display. If you need information on obtaining and using an SSL certificate, please see this article.