Forms Duplicate Entries

Your software
My Mautic version is: 2.16.3
My PHP version is: 7.2.34
My Database type and version is: MySQL

Your problem
My problem is:

How to restrict duplicate form entries? I want to restrict duplicate Email ID gets inserted via forms.

Currently forms are allowing to enter same user details multiple times.

How to apply validation check at form entry level whether entry is exist or no?

Hi,
The workaround I use:
Wrap your form in a dynamic content block, which has a condition: email is empty.
Contacts who have email already won’t see this form - so they can’t fill it out.
If you turn off ‘can restart campaign’, then they won’t restart the campaign your form is connected to anyway.
Joey