Is it necessary to include a return address on classified materials during transmission?

Including a return address on classified materials during transmission is essential for traceability. This practice ensures that if the classified material is misplaced, lost, or misdelivered, it can be easily returned to the sender, maintaining the integrity and security of sensitive information. Traceability is a fundamental aspect of managing classified materials since it provides a clear chain of custody and accountability throughout the transmission process. In military and government settings, where classified information is handled, traceability supports compliance with regulations and policies designed to protect national security.