Communication source

A sender or transmitter, outdated addresser, is in the information-theoretic sense of a sender-receiver model, a person or entity which can transmit a message ( broadcast message or other information ) through a medium to the receiver ( addressee ).

Postal services

A sender in the postal sense is the indication of the name and address for purposes of identification of the sender. In Germany is affixed to an envelope of the sender in the upper left corner of the front. The details of the sender is not mandatory under the Postal Act ( Postal Act ). In Switzerland, bringing the sender also in the upper left corner. With hand- written addressing the sender is sometimes located on the left below. In an envelope with a window to the information found in the sender line up in the field of view.

Previously, the following placements were common on the envelope: Cross on the left front and top of the back.

Since it often came earlier problems with undeliverable packages, was in DIN 5008 ( writing and design rule, effective 18 January 2005) stated that the sender is to provide full name and address.

Communication technology

In the communication and communication equipment is in principle only spoken by the transmitter, which transmits the information to the recipient. It can be transmitted over a radio, cable, or an optical link here. Transmitter and receiver must be coordinated so that the information can be received and evaluated at all and correct.


In transportation, the sender contractor of the Carrier. For the carrier arising from this contract the obligation to transport the goods to the agreed place and there deliver to the recipient. The sender, in turn, arises from the contract of carriage, the obligation to pay the agreed freight.