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PDF SIGNATURE VALIDITY UNKNOWN PDF

document is Signed and all signatures are valid.

PDF SIGNATURE VALIDITY UNKNOWN PDF

Digital Signature should now display a check mark and "Signature Valid". The main rationale for PDF used to be viewing and printing documents in a.

The "Validity Status" should now show "Signature is valid". You will be receiving PDF licences and letters through SPIRE and ICMS which will be digitally signed.

Add "Contact information for certificate owner:".

Left-click on the Digital Signature field.

Open the PDF file in PDF Converter Professional.

Please follow these steps to verify the digital certificates and digital signatures received from trusted sources:

This occurs when the digital certificate and digital signature associated with the PDF file have not yet been verified on the system. Note: Digital signatures created from a self-signed certificate in Adobe Acrobat display a question mark and the name of the signer when opened in PDF Converter Professional. When opening a PDF file containing a digital signature in PDF Converter Professional that was created from a self-signed certificate on another system, the digital signature may display a "Validity Unknown" or "Signature not verified!" message. Digital signatures display a question mark and a "Validity Unknown" or "Signature not verified!" message