DOCUSIGN Signed Document Signature Invalid

Dear All,

Attached is a sample pdf was signed with DocuSign account - eseal.
When validation signature using gembox library is comes up as invalid.
Code used: Validate PDF digital signatures from C# / VB.NET applications (

PDF download

Please advise? Thanks

Hi Raed,

Please try again with this bugfix version:

Or this NuGet package:
Install-Package GemBox.Pdf -Version 17.0.1349-hotfix

Does this solve your issue?


Hello Mario,

Yes this worked.
What are your plans to release this fix?


Please note that we do not make public releases on each build, instead, we do it after a few fixes and/or enhancements (cumulative updates).

Approximately we do it on a monthly basis, see the release dates:

This version will eventually be available in a publicly released bugfix version as well.

For now, please feel free to use that pre-released version.
Note that our pre-released versions go through the same testing process as our publicly released versions.