Hello,
I’m facing same issue which is reported at 5 yrs ago Old Post
I got Signature is invalid when applying both certified signature and PdfFileSecurity.SetPriviledge
There are errors in the formatting or informatio…..."yyyy-MM-dd hh:mm:ss tt", DateTimeLocalFormat = "yyyy-MM-dd hh:mm:ss...hh:mm:ss tt", ContactInfoLabel = "Contact Label", LocationLabel...