"Return to Sender" is a phrase commonly used in postal services to indicate that a piece of mail cannot be delivered to the intended recipient. This can happen for various reasons, such as an incorrect address, the recipient moving without leaving a forwarding address, or the recipient refusing the delivery. When this occurs, postal workers will mark the item and send it back to the original sender. In popular culture, "Return to Sender" is also the title of a song by Elvis Presley, released in 1962. The song tells the story of a person whose love letter is returned, expressing feelings of heartbreak and rejection. The phrase has since been used in various contexts, including movies and literature, often symbolizing unreciprocated feelings or failed communication.