I have Samsung fax & copy machine, SCX 5312F,
Press "Menu / Exit", then "System Data" on the one-touch dial keypad. The display shows the first system data option "Cassette Paper" on the upper line of the LCD display. Scroll through the options by pressing ^ until you reach the option "Message Conf." Then press < or > to select your choice. Options are: ON, OFF or ERR (prints only when a transmission is not successful). When the desired selection is displayed as indicated by the blinking cursor on the lower line of the LCD display, press "Mode / Enter" to save the selection. Press 'Menu / Exit" to exit the menu or "Stop / Clear" to return to standby mode.
Source: Samsung Laser Facsimile User Guide - Digital Laser MFP - SCX-5312F, pages 6.2, 6.4 and 6.5