Once an SSL certificate has been ordered, it needs to be validated. This proves that you control the domain.
Before SSL certificate provider can issue a certificate, you must prove control over the domains and any SANs (Subject Alternative Names) on the order. We refer to this process as the Domain Control Validation (DCV) process. There are three different ways to prove control, by HTML, DNS, or email.
When the email method is selected, an email will be generated and sent to an email controlled by the domain, for example "Admin@DomainExample.com". You have the option of choosing from several emails, but must choose from one of the provided emails. You can't enter your own email. The proof of domain control email will be sent to you containing a link. Click on the link to prove you've received the email and, therefore, control the domain.
DV certificates don't support domain prevalidation. Therefore, each time you order a DV certificate, you must demonstrate control over the domains on the order, even if you've previously proved control the previous year when you ordered the certificate.
After placing your order, you need to complete domain validation before DigiCert can issue your DV certificate.