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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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    How to validate an alphanumeric number, and not send it twice? Adding unique id to the form.

    Asked by vetnil on July 02, 2013 at 05:23 PM



    I want to know if there is a way to validate an alphanumeric number in a field?, and the user can not send the same number twice?

    For example:

    The customer will buy a product in a store, and then will receive an alphanumeric number in a range of 0 - 1000 like: Vet890 (for example), and it needs to put in the form to participate a raffle.

    But it can not use the same number twice!

    If it sends (when clicking the submit button a message will show that number it was already used).

    How can i make it? 

    Thanks a lot!


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    JotForm Support

    Answered by Mike_T on July 02, 2013 at 05:35 PM

    Thank you for contacting us.

    We have an Unique ID field that auto-increment the value and can have a custom prefix.

    User will not see that field, but you can show the value on the Email and/or form Thank You Page.

    Is this is something that you can use? Please feel free to contact us if you need any further assistance on this. We will be happy to help.