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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    How can I validate a field using an external web service?

    Asked by Gustavo on July 25, 2017 at 09:35 PM

    Hi there

    How can i validate a field using an external web service?

    I need to put the CPF from Brazil is the same of TAX ID in US, and request that to my webservice to check if the ID is correct, valid and etc...

    Also i want to fill up the address based on the information collected at the webservice based on the CPF/TAX ID number

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    JotForm Support

    Answered by Kiran on July 26, 2017 at 02:22 AM

    Unfortunately, it is not possible to fetch the data from external sources using JotForm. However, it may be possible by embedding the form using the full source code and add some additional programming code to validate the field. You may hire a programmer from Upwork or Freelancer to achieve your requirement.