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Document e-signing API issue in .NET

Getting error “The type GroupDocs.Signature.Domain.PdfDigitalSignature has no constructors defined” … Please help


Please share following details and we’ll investigate the issue:

  • API version that you are using (E.g. 19.10, 20.6)
  • Sample code or application to reproduce the issue
  • Sample documents (source file and digital certificate)

Hello Sir,

I have replied you via email. Can you please check and update on this.


We didn’t get such details from you. Can you please share again here or in private message?

Hello Sir,

Thanks For reply

API Version:

Please find attached sample code and Source file and digital certificate (54.5 KB)



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We’ve reproduced this issue at our end. Hence, it has been logged in our internal issue tracking system for further investigation and resolution with ID SIGNATURENET-2975. You’ll be notified as there’s any update.