How a Certificate Authority (CA) validates an EV domain
To qualify for an Extended Validation SSL Certificate, domain registration details must reflect the full organization name as included on the certificate request. In other words, your organization name must be listed in the certificate request exactly as is found in your Who Is record
See below image of The SSL Store™'s Who Is record as an example. Since The SSL Store is a part of Rapid Web Services, in order to get an EV SSL, we had to have "Rapid Web Services, LLC," in the certificate request; notice that is the same name listed in the address bar for our site.