This article applies to the Legacy Notes and Attachments feature in Salesforce Classic, which is being replaced by Enhanced Notes and Files in Lightning Experience. Use this article when you need to understand who can view or edit notes and attachments that have been marked as Private.
The Private Checkbox on a note indicates that the note is only accessible to the owner and administrators.
The Private Checkbox on an attachment indicates that the attachment is only accessible to the person who created or attached it, and to administrators.
Considerations for Managing Files and Notes Attached to Records
Note and Attachment Fields
About the 'Modify All Data' permission
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