We use cookies to give you the best experience on our website. If you continue to browse, then you agree to our privacy policy and cookie policy. (Last updated on: June 24, 2019).
Unfortunately, activation email could not send to your email. Please try again.
Syncfusion Feedback

Adding another digital signature to pdf makes the old signature invalid.

Thread ID:

Created:

Updated:

Platform:

Replies:

144450 May 7,2019 10:21 AM UTC May 9,2019 11:20 AM UTC ASP.NET MVC - EJ 2 3
loading
Tags: PDF
Ahmad
Asked On May 7, 2019 10:21 AM UTC

Hi,
I successfully manage to digitally sign pdf document using external hash. (https://www.syncfusion.com/forums/142454/how-to-add-signed-hash-to-pdf-as-signature)
but then if I try to add another signature to the document the old signature become invalid.
can you help with that?

Attachment: Outputsigned_31ce9f77.rar

Surya Kumar [Syncfusion]
Replied On May 8, 2019 01:21 PM UTC

Hi Ahmad, 

Thank you for contacting Syncfusion support. 

We have created a sample for your requirement, please try the same and let us know if the provided solution work from your side. 

Note: The issue which you have mentioned may also occur if there is trial version watermark applied to every PDF which you have created. So please make sure you are using the licensed version assemblies and there is no watermark added to PDF 

Regards, 
Surya Kumar 


Ahmad
Replied On May 9, 2019 08:42 AM UTC

Yes I still working on trial version of Syncfusion. And I don't add any watermark to pdf. do you? 
also will this be fixed after I moved to licensed version?


Sowmiya Loganathan [Syncfusion]
Replied On May 9, 2019 11:20 AM UTC

Hi Ahmad, 

If you are using the trial version of Syncfusion, it will add watermark to every PDF document which you have created. So the reported issue “Signature becomes invalid” may occurs due to this. This issue will be fixed once you moved to licensed version. Please let us know if you have any concerns on this. 

Regards, 
Sowmiya L 


CONFIRMATION

This post will be permanently deleted. Are you sure you want to continue?

Sorry, An error occured while processing your request. Please try again later.

Please sign in to access our forum

This page will automatically be redirected to the sign-in page in 10 seconds.

Warning Icon You are using an outdated version of Internet Explorer that may not display all features of this and other websites. Upgrade to Internet Explorer 8 or newer for a better experience.Close Icon

Live Chat Icon For mobile
Live Chat Icon