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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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    Limiting Submissions By IP Address

    Asked by Dave on March 30, 2014 at 02:10 PM

    I am setting up a contest and would like to use a form for voting but would like to limit the number of submissions one person can make in one day (to prevent any spamming).  Is there a way to do this?


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    JotForm Support Manager

    Answered by Jeanette on March 30, 2014 at 07:17 PM

    Yes, you can easily do that by setting up Strict Check to the form, please see how:


    Sometimes you may want to prevent users from making multiple submissions on a form. Unique Submission is used for that purpose. Here's how:

    1. While in the form builder, find and click  "Setup & Embed" tab the "Preferences" button from the toolbar

    2. In the preferences window, click "Form Limits" tab and Select the "Unique Submission" option you prefer, in your case it would be STRICT CHECK


    3. Click "Close Settings" button and save the form changes by clicking the "Save" button from the form builder.

    There is a difference between strict and loose check.

    Loose Check controls the cookie.

    Strict Check also controls the IP address.

    If you select Strict Check, people in the same network (in the same school, college,university, institution ) will not be able to make submissions, as the IP address for the network would be the same. If you are considering the target audience as students in the same school, Loose Check should be chosen.

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    Answered by mr08sports on March 30, 2014 at 09:10 PM

    Thanks Jeanette!  EXACTLY what I was looking for!  :)