By default, Foxit PDF Editor verifies signatures when the document is opened. An icon appears on the left top of Signature Validation Status message box to indicate the signature status. The signature state appears in the Signature Panel.
- The question mark icon
indicates the signature is not validated. - The check mark icon
indicates that the signature is valid. - The icon
indicates that the signature is invalid. The document has been altered or corrupted since the signature was applied. - The icon
indicates the document was modified after signature was added; however, the signature is valid. - The icon
indicates the signature validity is unknown because the signer’s certificate isn’t in your list of trusted identities.
If you open a certified PDF file with notification-related message enabled, Foxit PDF Editor will display a notification message informing you that the document is certified. You can click Signature Panel on the notification message to check the details about the document certification and signatures in the Digital Signatures panel.