How to delete hyperlink (Remove signature) in a form created with InfoPath

Question

Hello. 
We have Sharepoint 2013 Foundation in production. It work with forms created with InfoPath. In these forms, digital signatures are used to approve. The problem is that once you have signed the forms, the user can remove the signature. That's what we want to
avoid.
Which file should I edit to remove the hyperlink? I can not find how to do it. Do you know a better option? 
Greetings.
MCSA: Windows Server 2008

Answer 1

Hi,
According to your post, my understanding is that you want to delete hyperlink (Remove signature) in a form created with InfoPath.
As far as I know, there is no OOTB way to achieve this. You need to use custom code to prevent removal of digital signatures.
Please add the OnBeforeChange handler code to the "signatureN" group where the signature is stored, not to the section you are signing.
In other words (my excample) browse to :
Tools - Form Options - Digital Signatures - "Enable digital signature for specific data" - Modify/Add
Note the "Store signatures in the following group" value. It will be a read only value, eg /my:myFields/my:signature3/my:signature4
Here is a similar thread for your reference:
http://www.infopathdev.com/forums/p/3661/12829.aspx#12829
Best Regards,
Linda Li
Linda Li
TechNet Community Support