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.

  • Profile Image

    How do I prevent someone from submitting multiple of the same form?

    Asked by Lowcountryvalet on June 22, 2016 at 04:07 PM

    We just received 15 submissions from a single client with all of the same information. Looking at the submission times, it all happened with 2-3 seconds.

    This just bombarded our email inbox and I'm sure it did the same to the same to the client's email as well.

    Page URL:

  • Profile Image

    Answered by victor on June 22, 2016 at 06:15 PM

    Than you for contacting us. You can restrict the form so it will allow only one submission per device. If you open the preference setting, you can set the UNIQUE SUBMISSION feature to check cookies and IP. This will not allow users to submit multiple times from the same device.

    You can use our Delete duplicate submission app to remove all the duplication you have received.

  • Profile Image

    Answered by Lowcountryvalet on June 23, 2016 at 09:00 AM

    If the client is a return customer, would it prevent them from putting in a new submission?

  • Profile Image

    Answered by victor on June 23, 2016 at 10:31 AM

    If you enable this feature, no user will be able to submit more than once. If the user would like to submit another form, he/she would require to use another device.

  • Profile Image

    Answered by Lowcountryvalet on June 23, 2016 at 10:55 AM

    Then this is not a solution that works for us. It there another route that can be taken?

  • Profile Image
    JotForm Support

    Answered by Charlie on June 23, 2016 at 12:27 PM

    Could you please try adding a captcha field in your form, that should prevent users suspicious of spamming the form. Here's a guide about adding captcha on your form: https://www.jotform.com/help/205-How-to-add-a-CAPTCHA-field 

    I also recommend re-embedding your form using the iFrame embed code, here's a guide you can refer to: https://www.jotform.com/help/148-Getting-the-form-iFrame-code. See if those suggestions will prevent users from doing duplicate submissions.


    On a different note, please read our terms of use page. We do NOT allow forms asking for sensitive information like credit card details. This is a clear violation of our terms and will lead to your account to be suspended:


    It is a must to add a payment integration on your form is you are asking payments from your users, if you do not wish to charge them immediately, you can enable the payment authorization feature, here's a guide about it: https://www.jotform.com/help/292-How-to-Enable-Payment-Authorization 

    I went ahead and deleted those guilty fields, please do not create similar forms or fields to avoid being suspected of phishing or violating our terms.


  • Profile Image

    Answered by yasemincicektr on April 21, 2017 at 08:59 PM


    Where can I find "Preferences" wizard in the JotForm? 


    Thank you

  • Profile Image
    JotForm Support

    Answered by liyam on April 22, 2017 at 05:19 AM

    Hello yasemincicektr,

    I have moved your question on to a new thread. We'll respond to the thread in a short while.