What does the term "Return to Sender" mean?

The term "Return to Sender" specifically refers to mail that is being sent back to the original sender because it could not be delivered for various reasons. This might include the recipient being unknown at the address, the address being incorrect, or the recipient being unable to accept the delivery. When a piece of mail is marked as "Return to Sender," postal workers ensure it is sent back to the address from which it originated.

This concept is crucial as it helps maintain the integrity of the mailing system and ensures that undeliverable mail is properly accounted for and does not remain untracked in the postal system. The action also provides the sender with the opportunity to correct any errors on the address label or to update the recipient about the issue. Understanding this term is important for both senders and postal workers to facilitate smoother mail handling.