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.

  • Profile Image

    How to prevent people from submitting the form multiple times with the same information?

    Asked by dawnclea on June 03, 2014 at 01:19 PM

    How can i make sure people do not register 2 times with the same information

    Thank you

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    Answered by EliezerN on June 03, 2014 at 02:35 PM


    Preventing one single user to submit multiple times is possible by setting up a form limitation:

    For this purpose you may set a Unique Submission Limit and/or a Unique Question limit.

    - With Unique Submission limit if you use/select Loose Check, it will use Cookies  and if you select Strict Check it will use IP Address to prevent multiple submissions.

    - And with Unique Question, it will not allow previously entered values. For example if you choose the Email field as the Unique Question, a user will not be able to submit the form if he tries to use the same email address for a second time.

    You can read more about Form Limits on these guides: 

    - How to Set Unique Submission on a Form

    - How to set form limits based on a question

    Please inform us if you need further assistance with this query.