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Validate PDF Digital Signature - Community / GemBox.Pdf Feature Request - GemBox Support Center

An ability to be able to tell using c# if 1) the number of times a PDF has been digitally signed and 2) if the signature(s) are valid.

Official response

Mario - GemBox

Hi,

This feature request has been implemented and is available in latest versions of GemBox.Pdf:
https://www.gemboxsoftware.com/pdf/examples/c-sharp-vb-net-pdf-digital-signature-validation/1105

Regards,

Mario
GemBox d.o.o.