Manual evidence is proof collected by people rather than automatically by systems. In cyber security, this often means screenshots, exported reports, spreadsheet entries, ticket notes, or checklists gathered to show that a control existed at a specific time.
It matters because manual evidence is usually a snapshot, not a live view. It can be slow to collect, easy to mistype, and hard to verify at scale. Attackers and weak processes can exploit the gap between review cycles, while defenders use manual evidence to support audits, document control operation, and confirm that policies were followed. Modern security programs try to reduce reliance on manual evidence by pulling data directly from logs, configuration tools, and compliance platforms.