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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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Only one registration per unique email, no double registration.Asked by oynyberg on January 16, 2015 at 04:05 AM
Is it possible to restrict to only register once with the same e-mail?
Best sulution for me:
A members area with password, so they can change their adress if they moves to a new place for example.
If not, do you know anybody who have online forms with membership area?
unique email online forms register same
You can set limits based on a question from your form. Please follow this guide: http://www.jotform.com/help/223-How-to-set-Form-Limits-Based-on-a-Unique-Question. Kindly check this and let us know if this suits your needs.