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Prohibit duplicate forms with the same email

Hey Webflow,

I recently launched a website where I got a much higher response than anticipated. However, some of the email signups were duplicates. Since Webflow limits the number of form submits by billing plan, I was wondering if there was a simple way to prohibit the same email being submitted in a form. For example, a simple newsletter signup form. If they did try to sign up, I would like to display the form error message. This could lengthen the amount of time it takes me to hit my form submit limit. I could go through and delete duplicates, but when we are talking about hundreds or thousands of submits, that becomes tedious.

If you have any ideas, please let me know.


Use a professional newsletter service like That will prevent duplicate emails.