Adding visualisation to signature

Posted by: adam.jachocki on 9 October 2022, 11:50 pm EST

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    Posted 9 October 2022, 11:50 pm EST

    Hi, I am trying to add visualisation to existing signature. Pdf was signed by thirparty signing service - without any signature. So I tried to add WidgetAnnotation to SignatureField. But after that signature is treated as invalid.

    So, is there any way to add signature visualisation to already existing signature?

  • Posted 10 October 2022, 8:14 pm EST

    Hello Adam,

    We do not see any license key linked to your email so we are assuming that you do not have a license. If you run a sample that uses a signed PDF without a valid license key of GcPdf, then the original signature in the generated PDF is invalidated. This happens because a license header is added to the PDF in such cases which changes the original signed document.

    If you have the license then please share the stripped-down sample to show your issue and if you need the trial key to evaluate the product then please feel free to ask.


    Prabhat Sharma.

  • Posted 10 October 2022, 8:20 pm EST

    Hi, I don’t have a license yet. I’m trying different products to check which answers my needs.

    I was aware of this header, so I first saved a file using GC and then signed file with this header. I hoped that header won’t be added for a second time.

    Anyway is there such possibility to add signature visualisation to already existing signature?

  • Posted 11 October 2022, 8:02 pm EST

    Hello Adam,

    Your case has been replied on the given link:

    You can also go to your My Support page to see the case:

    Case ID: CAS-34988-G7G6F8


    Prabhat Sharma.

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