What is the main purpose of marking classified documents?

The main purpose of marking classified documents is to clarify the classification level and handling requirements. This ensures that individuals who access or handle the document understand the sensitivity of the information contained within it and the specific protocols that must be followed to protect that information. By indicating whether a document is classified at different levels, such as confidential, secret, or top secret, it provides clear guidance on how the information should be treated, stored, distributed, and disposed of.

Proper marking helps prevent unauthorized disclosure by reminding users of their responsibilities regarding safeguarding the information. Additionally, it facilitates accountability in managing classified materials, as well as compliance with legal and regulatory obligations related to information security. Without clear marking, individuals may inadvertently mishandle or improperly disclose sensitive information, potentially compromising national security or other important interests.