If I buy an Extended Validation (EV) SSL Certificate, which document(s) do I need to provide?

EV certificates require a more stringent verification process than OV certificates. To understand the basis of this procedure, please refer to the above question about OV certificate verification. Please note that EV certificates require you to complete a few extra steps, including proving both physical and operational existence as well as completing a simple telephone call with the Certificate Authority (CA) directly.