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 to prevent duplicate submissions?

    Asked by molenict on May 26, 2017 at 03:35 AM

    i have in 5 min 200+ contact request from the same user

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    JotForm Developer

    Answered by Helen on May 26, 2017 at 03:54 AM


    Thank you for contacting us.

    I have checked your form and submissions. It might be possible that the users of your form submitted your form multiple times or it can also be a spam. I am thinking that the duplicate submissions are being caused by spam.

    You can take advantage of our unique submission feature to block multiple submissions from one system of one IP address by setting the "Loose check" or "Strict Check" respectively.

    Here is a guide to help you set unique submission in your form: http://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form

    You can also use our unique question feature to prevent from submitting duplicate submissions. Example: You can set one of your forms questions (like cell number or email address) to be a unique question. This will not allow a user to use the same cell number or email address to submit your form.

    Here is a guide to help you: http://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question 

    I hope it helps. If you have any questions or issue, please do not hesitate to contact us.