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.
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Hello, the double opt-in process is possible with integration through services such as Mailchimp. As you can set automatic sending of emails during the form submission process which will in turn perform the double opt-in you are looking form.
This is a screenshot of Mailchimps integration showing the opt-in (email) for double opt-in purposes:
Do let us know if you need additional assistance. Thank you.
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