Duplicate Killer – This extension prevent double entry submissions for Contact Form 7, Forminator and WPForms Lite plugins.

*Duplicate Killer it’s the easiest way to ensure that a designated field has unique data entered into it. With this plugin you can stop duplicate entries for Contact Form 7, Forminator and WPForms Lite.

Extension for Contact Form 7 plugin

• Limit one submission per Email address, Phone or TextField.
• Customise error message for duplicate entries.

Extension for Forminator plugin

• Create your best list without duplicates!
• Choose the unique fields from Email, Phone, TextField.
• Warn the user that the value inserted has been already submitted!

Extension for WPForms Lite

• Duplicate Killer support one of the best free WordPress forms plugin.
• Stop your clients to duplicate the entries of your contact forms!
• Inform your clients when the value has been already submitted!

Unique entries per user

• You can prevent duplicates at the user level, not global.
• Multiple users can submit the same entry, but a single user cannot submit values they have already submitted before.