Yes, Organization validated SSL certificates does require documentation work, please find the below procedure in order to validate your businesses with CAs.
For Comodo Instant SSL: Follow this Validation Procedure.
For GeoTrust, Verisign and Thawte Organization Validation: Follow this procedure (GeoTrust, Verisign and Thawte owned by Symantec Corporation and have only single method for all its validations).
All the validation process will be done by respected certificate authorities, Host Department didn’t support in anywhere through out the validation process. In case if you fail to validate your organization your certificate will be cancelled and you can ask Host Department or the certificate authority to re-raise the request for the validation after you correct your organization details.
You have to strictly follow the CAs guidelines in order to validate your organization, failing to do so may result in cancelling of your certificate.