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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    CPF Number Validation for Brazilian Users

    Asked by cyrusrj on August 01, 2012 at 09:24 AM

    Tem como validar CPF? caso o usuario digite o CPF errado o formulario detectar?

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    JotForm Support

    Answered by NeilVicente on August 01, 2012 at 03:51 PM

    Antes de podermos dar uma resposta, precisamos compreender inteiramente o que o problema está em causa.

    Posso saber o que é CPF? Como você quer que a forma de se comportar quando um CPF errado for inserido?

    Before we can provide an answer, we need to fully understand what your issue is about.

    May I know what CPF is? How do you want the form to behave when a wrong CPF is entered?

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    Answered by leonardodario on June 17, 2013 at 09:36 PM

    I'm in the same problem. cpf, for us Brazilians is an official document that proves the identity of each citizen. you (americans) do not have it, but it would be as your social insurance, however it is mandatory for us ... in almost any form and the presence of the CPF is required. But I find it difficult to enter into an agreement to solve this problem, in view of this lack of knowledge culture. but the validation is done through a federal website (http://www.receita.fazenda.gov.br/aplicacoes/atcta/cpf/consultapublica.asp). ty for listening

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    Answered by dinesh-it on June 18, 2013 at 12:30 AM

    Hi, Thank you for your further information.

    I will Escalate this request to our development team now.

    We will get back to you as soon as we found any solution or if we need any further information for this. 

    Thank you.

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    Answered by fuone on September 19, 2013 at 05:26 PM

    There are some scripts in internet that can "validade" the CPF numbers. This scripts check the logic sequence of numbers to find out if the CPF entered is valid or not.

    But they are JavaScripts. If we could insert custom Javascript just like css, this matter would be solved.

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    Answered by Cesar on September 19, 2013 at 09:23 PM

    Hello fuone,

    Kindly create a new thread for your inquiry so that we may provide you more efficient support, and to avoid confusions of the steps being discussed here. Thank you.l

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    Answered by Spei-Form on December 30, 2013 at 09:57 AM

    Hi Support,


    Have you any news about CPF validation?

    It's can be done by checking in receita's web site (leonardodario post the link), or using a javascript to validate digit verification.



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    Answered by EliezerN on December 30, 2013 at 10:17 AM


    Our dev team has not updated us about this concern. For further assistance about this topic we would appreciate if you open your own thread to post your questions/comments and we will forward your request to our dev team if necessary.