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 change a text box to only allow usernames that haven't been submitted previously

    Asked by jonathanpiechnik on January 06, 2015 at 06:07 PM

    Hi, Is there any way to allow for clients to fill in a username that they'd like while also keeping them from using usernames that others have used previously?


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    JotForm Support

    Answered by jonathan on January 06, 2015 at 07:33 PM


    Are you perhaps referring to unique question submission.

    Check this user guide  -How-to-set-Form-Limits-Based-on-a-Unique-Question


    When you assign a field as a unique question, it will prevent submissions if the same answer is provided to that unique question on the form. This will then prevent duplicated answer on that particular question.

    Hope this help. Let us know if you need further assistance.