Franking machine is a machine used to affix postage stamp on outward letters and envelopes. In big offices where hundred of outgoing letters require stamping franking machine is of great value because this machine can print the impressions of postal stamps of various denominations. These machines are hired from the post office under a license. At the time of postage impression, the firms name, trade mark is automatically printed. These machines save time, labor on affix of postage stamps, and are quicker and neater. The possibility of pilferage in stamp use is liminated.

A machine used to print the addresses of the customers on outgoing mail is called addressing machine. The use of addressing machine was first felt in 1893. This machine can print 1000 addresses in an hour. This machine can be operated manually or electrically. This machine is useful for newspaper offices, banks and insurance companies.