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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 avoid duplicate submissions

    Asked by facturamelo on December 14, 2016 at 01:35 AM

    recibo formularios duplicados al parecer los formulario se repiten cuando el usuario vuelve atras en su navegador.

    Hay forma de evitar esto?

    Ya intentamos agregar un captcha pero el problema continua.



    This is a re-post of a comment on How to Set Unique Submissions on a Form

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    JotForm Support

    Answered by owen on December 14, 2016 at 01:46 AM

    Hi,

    There are several ways to avoid duplicate submissions and yes, using a captcha is one of them. Please let me introduce you other ways:

    1. Setting unique submissions: You can make the form check the cookies and/or IP of a user before submitting the form. This will prevent the form to be submitted more than once if a cookie is already set or if the IP had already submitted the form. Please see how you can do it on this guide(this is where you are coming from actually, but I just wanted to point this out again):

    https://www.jotform.com/help/64-How-to-Set-Unique-Submissions-on-a-Form

    2. Setting form limits based on a unique question: You can set one of your fields to be unique in your submissions. This means when a same entry is filled on that specific field the form prevents itself from being submitted. Please see how you can configure this:

    https://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question

    These options should resolve your issue. 

    Please contact us again if you need any further assistance.