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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    Enable IP blocking

    Asked by carolina1 on August 13, 2015 at 06:19 AM

    Hi,

     

    Is it possible to enable IP blocking in order to prevent respondents to replying more than once to the same survey/form?

    Many thanks

    Carolina

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    Answered by Sammy on August 13, 2015 at 08:28 AM

    You can set this option in the form preferences under the form limits, select the strict check option to block based on the IP address, see screenshot below

    You can also use the unique question to use a field like email to allow only unique email addresses in your submissions