When you request an EV. They call you by the phone number that you give to ask if you requested a certificate. That was the complete extend of the validation. I could be a scammer with a specificity designed domain name and they would just accept it, no questions asked.
Depends on the registrar. Globalsign required the phone number to be one publicly listed for the company in some business registry (I forget exactly which one), so it had to be someone in our main corporate office who'd deal with them on the phone.
I'd love a referral to your certificate authority and rep - we go through a big kerfluffle each renewal period, only eventually receiving the certificate after a long exchange of government docs and CPA letters. For us, only the last step is the phonecall like you say.
Having run an EV issuing practice… they were required to contact you at a D&B listed number or address.
EV certs also showed the legal name of the company that requested the certificate - that was an advantage.
> In addition to all of the authentication steps CAs take for DV and OV certificates, EV certificates require vetting of the business organization’s operational existence, physical address and a telephone call to verify the employment status of the requestor. [1]
[1] https://www.digicert.com/difference-between-dv-ov-and-ev-ssl...
Tying a phone number to a physical address and company is a lot more useful than just proof of control over a domain. Of course its not 100% fool proof and depends on the quality of the CA but still very useful.