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.
Hi, Upto my Uderstanding your are asking about Form Limit options in Preferences right?
Which Means, You can limit the number of submissions a user can made in your form according to IP address or Cache. Or Even you can Limit it By Some Unique fields in your Form.
Refer this Guide for More Information: http://www.jotform.com/help/137-How-to-Limit-Submissions-in-a-Form
Let us know if you need further assistance.