What is the correct response when receiving classified information not intended for you?

When classified information not intended for you is received, the appropriate response is to notify the sender and return the information securely and promptly. This action is critical because it demonstrates adherence to the protocols established for handling classified materials. By notifying the sender, you are ensuring that they are aware of the mistake and can take any necessary corrective measures. Returning the information securely is also essential to maintain the integrity and confidentiality of classified data, preventing it from falling into the wrong hands.

Keeping the information for personal records is inappropriate, as it could lead to unauthorized access or misuse of sensitive data. Sharing it with a colleague further compromises the integrity of the information and violates established security protocols. Deleting the email immediately might seem like an expedient route, but it does not address the issue of accountability and may lead to issues with tracking and compliance. Keeping transparent communication about such incidents is key in a security context, reinforcing the importance of responsible handling of classified information.