private documents on company`s printer - problem

[Piotr Adamcio]

I have a serious problem with printed documents in the our company. I have cups print server and printers installed on the computers but employees print private documents on company`s printers. Is it possible to view printed documents stored in /var/spool/cups? or any other way to check what is the contents printed file? In cups web interface are only lists of this documents but i cant view them.