How to confirm domain ownership?


How to confirm domain ownership?


Domain ownership confirmation methods are Email, DNS, File validation.

Domain validation is required for all SSL certificates: OV, EV, and DV.

The most popular method is email validation, but with the help of our API you can change this to one of the other validation methods. Please refer to examples applicable to DV Products validation.

Table of contents
1. Email validation
2. DNS validation
3. File validation

Click "Follow the instructions" in the "Certificate history" block to retrieve value for exact orders.
mceclip2.pngIf you integrated with Openprovider via API please use method of "Retrieving SSL Orders".

Email validation

Outgoing email to an address that is linked to the domain name that the SSL certificate(s) will secure.
It contains a link that the recipient should click to validate the certificate. The following so-called "approver email addresses" are containing pre-approved values:

    • admin@..., followed by the (sub) domain of the certificate ;
    • administrator@..., followed by the (sub) domain of the certificate ;
    • postmaster@..., followed by the (sub) domain of the certificate ;
    • hostmaster@..., followed by the (sub) domain of the certificate ;
    • webmaster@..., followed by the (sub) domain of the certificate ;
    • WHOIS-visible email addresses e.g. JohnDoe@ ... , for the owner or admin contact of the domain. This will only be an option, if the whois is publicly available. (For example, this is possible for .nl, not possible for .com) 

Please note that select one of an approval email during order creation is required for Comodo products. 
Use API response: Retrieving a list of approval emails.

DNS validation

Use hash values as a DNS record for a domain according to the format, where is the FQDN (Fully Qualified Domain Name) contained in your certificate:

CA Comodo
Record type CNAME
Example Host/Sub:

File validation

Hash values are provided to you to create a simple plain-text file and place this in a specific host directory. 

CA Comodo
File http(s)://
Content 604e2bad6c9a0dd4d26a0cc3743d19b0ae277f8ec02f07b59e6ae6cc441e57f2
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