CentralNotice Extended Validation Certificate From Wikipedia, the free encyclopedia Jump to: navigation , search An Extended Validation Certificate in Mozilla Firefox . An example of a multi-domain, UCC (SAN) EV certificate on https://www.ssl.com (note the Subject Alternative Name (SAN) field). Wildcard names are not allowed in EV Certificates so this is a common "workaround". An Extended Validation Certificate (EV) is an X.509 public key certificate issued according to a specific set of identity verification criteria. These criteria require extensive verification of the requesting entity's identity by the certificate authority (CA) before a certificate is issued. Certificates issued by a CA under the EV guidelines are not structurally different from other certificates (and hence provide no stronger cryptography than other, cheaper certificates), but are desig...