Sometimes these CAs think that if they just send us some printout, that's good enough and they can keep on trying to collect. ......BUT if you call them on it and let them know you don't think it's sufficient proof, then they either have to come up with REAL validation or stop attempting to collect (and by law, they cannot continue collection activity until the debt has been validated)
SO.....if they write you back with more BS pseudo validation, I would write them again saying it's still no good and if they do not cease all collection activity, you will start filing complaints and/or take legal action if they don't leave you alone.
If they don't respond and try to continue collection activity, they are in violation and you can file complaints and/or sue them.
~yw