Yes, that is what is said, but if there were anything else, like names for whom they haven't got good proof that they were actual clients I'd presume they would be left out, without explaining anything. Because I'd assume they would not want to point fingers and ruin the lives of anybody who might be innocent, just in case said person actually was innocent. Blackstone's ratio - "It is better that ten guilty persons escape than that one innocent suffer" - and all that.