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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    How to prevent duplicate payment submissions?

    Asked by hkmurano on January 26, 2017 at 01:49 PM

    I got problem with payment many time.

    Client made one time payment. But next day charge again , charge again.

    I was contact client , she saying made only 1 payment and merchant company check system, not found system error.

    I was deleted client form submission, stop problem.

    Please check our payment form,,,,,,any problem.

    Thank you again.

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    JotForm Support

    Answered by BJoanna on January 26, 2017 at 02:44 PM

    Sorry for inconvenience this may caused you. 

    I am not exactly sure how this has happened. Maybe your user did not closed browser tab in which form was filled and somehow form was resubmitted, most likely by using back browser button.

    To prevent duplicate submissions you can set unique submission on your form: 

    How to Set Unique Submissions on a Form

    You can also set form limit based on unique question:

    How to set Form Limits Based on a Unique Question

    And you can add a captcha to your form:

    How to Add a CAPTCHA field

    Let us know if you need further assistance.