You can print embedded pattern on paper to prevent them from being copied.
Using the printer driver, you can embed a pattern in the printed document. If the document is copied on a machine with the Copy Data Security Unit (optional), protected pages are grayed out in the copy, preventing confidential information from being copied. Protected fax messages are grayed out before being transmitted or stored. If a document protected by unauthorized copy guard is copied on a machine that is equipped with the Copy Data Security Unit, the machine beeps to notify users that unauthorized copying is being attempted.
If the document is copied on a machine without the Copy Data Security Unit, the hidden text becomes conspicuous in the copy, showing that the copy is unauthorized.
Using the printer driver, you can embed text in the printed document for unauthorized copy prevention. If the document is copied, scanned, or stored in a Document Server by a copier or multifunction printer, the embedded text appears conspicuous in the copy, discouraging such unauthorized copying.
See the printer driver Help, Facsimile Reference, Printer Reference and Security Reference.