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.

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    How can I prevent duplicate submissions?

    Asked by vimlapwr on October 15, 2016 at 12:51 PM

    How can I prevent duplicate submissions.

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    JotForm Support

    Answered by Welvin on October 15, 2016 at 03:03 PM

    Please try adding a captcha field in the form. I would recommend Google re-Captcha widget:


    Here's how to add a captcha in your form(s):