A return address, also known as a sender's address, is the location on an envelope or package from which it was sent. In addition to "return address," there are various synonyms that can be used interchangeably to describe the same thing. These synonyms include sender's location, mailing address, sender's details, sender's coordinates, and sendee's information. While the terminology may differ depending on the context and the individual's preferred method of communication, the general concept of a return address remains the same. Properly marking a return address on a package or envelope is essential for ensuring successful delivery and preventing it from being lost in transit.