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.
Could you please clarify, what are deleted? Are you referring to actual forms or their submission data?
If the actual forms are deleted, they are initially placed in the "Trash" folder and you can restore them there. Here's a guide about it: https://www.jotform.com/help/134-How-to-Restore-Deleted-Forms
If the submissions are deleted, then, unfortunately, they cannot be recovered. We do not store a backup of these data, our users own and handle their submission data, once deleted, they are removed permanently from our servers to avoid privacy or security issues.
However, if you have setup email alerts containing a copy of the submission, then you can use that as a reference. Or you can check your form's email history to view the copy of the submission there: https://www.jotform.com/help/293-How-to-View-All-Your-Form-Email-History.
For future use, I strongly suggest integrating your form to 3rd party storage services like Dropbox, Google Drive or Box.com to have a real time backup of your submissions and file uploads:
I hope that helps.