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.
JotForm Support Manager
I am not sure if in your case you sent a PDF form to the user. A most practical way would be to just share the link to a webform. That way, if you create an email notifier, you'll get all the data your clients submits to you.
Here is a guide to help you to create the notification:
Please do not hesitate to ask for more help.