Hello!

The idea to implement e-signature as basic functionality in further releases is already registered for our R&D team. We will add your case to it's backlog so to increase it's priority.
As f​​​​or now, this issue has already been discussed in another post, this may help you:

https://community.creatio.com/questions/capture-signature-mobile-applic…
 

Thank you for contacting the Creatio technical support team. 

Anton Starikov,

Thanks Anton, I'm Already see this post, but it's not clear to me the solution, not too much detail where to introduce the code and so in..

I'mI'll try https://www.signnow.com/api/automated-digital-signature-for-creatio-for…