Copy machines are not the Mimiagraph machines of old. They are computers attached to very sophisticated scanners. Whatever you copy is stored in that computer. For how long? Ask the machine's owner.
Where does your lawyer make copies? Who copied your loan application? what about that lease? Who copied your daughters's school amission forms? All of those images are easily extracted from the copier, usually with a laptop, and not always by the owner. Who has access to copiers containing your private information?
Chances are, you shouldn't risk copying anything with personal information on any copy machine which you do not own.
Copy Machines Can Store Your Private Info - wbztv.com