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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    Populate field data already filled

    Asked by MedcomMedicamentos on July 12, 2017 at 09:42 AM

    tenho um campo onde a pessoa vai colocar um número, gostaria de saber se é possivel em um outro envio da mesma pessoa se ela colocar o mesmo número informa que o numero ja foi usado

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    JotForm Support

    Answered by Jan on July 12, 2017 at 12:52 PM

    I recommend you set a unique question to that field. This will prevent duplicate submission using the same value. 

    For example, the user fills up your form with this email address (user1@user1.com). Another user or the same user will not be able to submit the form if the same email was entered.

    Here's a guide: How-to-set-Form-Limits-Based-on-a-Unique-Question.

    I also suggest you check these widgets:

    Inventory widget
    Gift Registry widget
    Ticket Purchases widget

    Hope that helps. Thank you.