What notation is required for an unclassified document attached to a classified document?

The required notation for an unclassified document attached to a classified document is that it must clearly denote its status to prevent any potential mishandling of information. When an unclassified document is included with classified material, it is important to communicate that the unclassified document’s status changes when it is separated from the classified material. The notation "Unclassified when separated from classified enclosure" effectively indicates that while the document is not classified on its own, its association with classified material changes how it should be handled.

This notation serves to inform recipients that additional care should be taken with the document as long as it remains attached to classified material. It reinforces the understanding that once the unclassified material is detached, it does not retain any classified implications. Thus, it helps mitigate risks related to improper dissemination of information.