If you’ve purchased your SSL Certificate from us, you can use the following instructions to add an SSL seal on your website, depending on which certificate you purchased.
RapidSSL
https://knowledge.rapidssl.com/support/ssl-certificate-support/index?page=content&id=SO5991
QuickSSL Premium
http://www.geotrust.com/support/quick-ssl-support/true-site-seal/
GeoTrust True Business ID with EV
http://www.geotrust.com/support/true-businessid/true-site-seal/
If you have purchased a certificate from a third party vendor, their website should have further information on use of their seal.