A Domain Validated (DV) SSL certificate is a quick and easy way to secure a domain, as the Certificate Authority (CA) issuing the certificate only requires verification that the recipient actually owns the domain they wish to cover.
This verification process can typically be completed in a matter of minutes. However, these certificates offer little in the way of SSL recognition, so they are recommended for websites where visitor trust is not of high importance and information like usernames, passwords, or credit card information is not required.
You do not need to provide any documentation in order to purchase a Domain Validated (DV) certificate. All you will need to do is confirm that you own the domain you wish to cover, either through a simple email or file-based authentication.