PURPOSE Accidental data exposure often happens through wrong recipients, broad permissions, public links, hidden data, or screenshots. BEFORE SHARING Check recipients, attachments, file permissions, hidden sheets, comments, metadata, and previous message history. USE LEAST ACCESS Share only with people who need the information and only for as long as they need it. COMMON MISTAKES Reply-all, autocomplete errors, forwarding long threads, and using anyone-with-link sharing. IF IT HAPPENS Report it quickly. Speed matters more than embarrassment.