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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    Is there a way to avoid duplicate submissions by checking a unique field?

    Asked by aloprint on December 16, 2016 at 02:33 PM



    I have a form for example with a field called TICKET the end user write your ticket number, for example 123456 (unique number)

    It´s possible when press SUBMIT form, Jotform validate if these number 123456 exits previously?

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    JotForm Support

    Answered by Jim_R on December 16, 2016 at 03:43 PM

    Hello - There is a way to achieve that by setting a Unique Question to your form.

    Just click PREFERENCES at the top of the FORM BUILDER > ADVANCED tab > pick the field that you want to be unique (in this case the Numero de Ticket field) as your UNIQUE QUESTION > SAVE.

    Related guide: How-to-set-Form-Limits-Based-on-a-Unique-Question