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

    Tokens or other methods for preventing multiple submissions

    Asked by analogueteacher on July 25, 2013 at 12:54 PM

    I'd like to create a form that lets customers register products that they have purchased from us. Ideally, I'd like to create a field into which they could enter a unique serial number or token to verify their purchase. Once a serial number has been registered, the form would prevent other users from registering with the same number. 

    Is this possible? If so, how would I do it?

    Thank you in advance.

    Page URL:

  • Profile Image

    Answered by dinesh-it on July 25, 2013 at 02:12 PM

    Hi, You can use our Form Submission Limit Option under Preferences Tab.

    Open your form in Edit Mode:

    1. Select Preferences

    2. Choose Form Limit Tab and set Options as shown below.


    Hope this information helps you.

    Thank you.