When you give the printer to someone else or dispose of it, erase all the personal information stored in the printer's memory (such as network settings, fax numbers, and recipients' names on fax-capable models) by selecting the menus on the control panel as described below.
Settings > General Settings > System Administration > Clear Internal Memory Data > PDL Font, Macro, and Working Area
Settings > General Settings > System Administration > Reset > Erase All Data and Settings > High Speed, Overwrite, or Triple Overwrite