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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.

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    Stop Duplicate Field Values

    Asked by cavaliergrp on July 25, 2014 at 04:07 AM

    Good Day


    How can I use Jotform to stop the entry of duplicate entries for a specific field.

    Our form has a invoice number value, I only want the form to accept a unique invoice number. In other words if the invoice number was already captured the system should stop you.

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    JotForm Support

    Answered by Welvin on July 25, 2014 at 06:18 AM


    Limiting form based on a unique question is possible. Please kindly check this guide: https://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question. All you need to do is to select the invoice number to the settings:

    Please get back to us if you need further assistance.