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.
how to limit multiple entriesAsked by PHED on August 19, 2016 at 07:13 PM
You can avoid receiving duplicate entries from your form by enabling the unique submissions on your form. This user guide will help you understand how to enable it in your form: https://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form
Another method is having a submission-specific entry, so for you to receive unique submissions on a specific question. This guide provides additional information and the steps on how to use this in your form: https://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question
If you have further questions or you need assistance, please let us know.