This CBSNews story may be a gentle reminder for some or first time knowledge for others that what you copy on a copy machine or send/receive on a fax machine likely stays in memory on that machine. This is especially concerning when copying or sending/receiving faxes on a public machine or leased machine. If you lease a machine, ensure that the hard drive or flash memory is completely and thoroughly wiped. If not, you might want to consider destroying the hard drive.
Copy Machines a Security Risk? All In Investigations