What, I wonder, is being certified here? I am familiar with ISO 9001 and EN 15038, and I can't really imagine a lot of value that would be added here. But perhapZ the SiteStaff have developed important and relevant criteria, such as testing the timeliness of bank transfers for a specified amount. Both end customers and freelance translators would benefit from knowing that an agency using ProZ has been verified as a registered business with a working bank account.
So KudoZ to the phoax at Ze Zite for distinguishing such select translation service resellers (TSRs) as: