There are some very common Document security threats which should not be overlooked. You should be very careful before sending any sensitive data to copiers and printers. Hackers can easily steal facts from a print stream sent to get printed. In order to avoid this, encrypt all important files sent over a network to your printer.
Take lot of care for the documents on copier hard drives. As per the model, your copier might have thousands of documents on its hard drive, like- invoices, HR records, checks or patient files. As a security measure, many copiers have a function called overwrite, use it.