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 it does not have any integration. From where you are downloading the submission PDF file? Do you mean to say that you want to rename the submission PDF which is attached in submission email?
Unfortunately it is not possible to rename the submission PDF file. It is always attached in email with the submission ID as the file name.