"Return to sender" is a common phrasing used when undeliverable mail is processed to be sent back to the indicated return address. It may also refer to:

• "Return to Sender" (song), a 1962 Elvis Presley song
• Return to Sender (2004 film), a 2004 film, starring Aidan Quinn, Connie Nielsen, Tim Daly and Kelly Preston
• Return to Sender (2015 film), a 2015 film, starring Rosamund Pike, Rumer Willis
• Return to Sender (Dexter), a 2006 episode of the television series Dexter
• Return to Sender, a webcomic by Vera Brosgol
• Operation Return to Sender
• Return to Sender, a German independent record label