What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I did check your last edited form and found that you have already added the signature field in form successfully. Please check the screenshot below:
I will still go ahead and explain you how to add the signature field in form. We do have few signature widget which you can add in your form: http://widgets.jotform.com/search/signature
Please check the screenshot below on how to add the signature widget in form:
Hope this helps.
Do get back to us if you have any questions.