Duplicate Killer – Stop Duplicate Form Submissions in WordPress (CF7, Elementor, Formidable Forms, WPForms)

Description

Duplicate Killer helps you stop duplicate form submissions in WordPress.

If your forms receive the same email address multiple times, fake leads, or repeated submissions, this plugin fixes the problem instantly.

Choose which fields must be unique (email, phone, text) and block duplicate entries automatically — without changing your form design or user experience.

Duplicate Killer works silently in the background and integrates seamlessly with popular WordPress form plugins and page builders.

Supported Plugins

• Elementor Forms
• Formidable Forms
• Contact Form 7
• WPForms Lite
• Forminator
• Breakdance Page Builder Forms

Key Features

✔ Stop duplicate form submissions without CAPTCHA
✔ Works with existing forms – no changes required
✔ Prevent duplicate submissions by Email, Phone or Text fields
✔ Stop duplicate emails and repeated leads
✔ One global error message for all forms (Free version)
✔ Optional IP-based duplicate protection
✔ Store unique entries securely in your WordPress database
✔ Automatically store uploaded files from Contact Form 7
✔ Lightweight, fast and easy to configure

NEW: Formidable Forms Support

Duplicate Killer now fully supports Formidable Forms and helps you stop duplicate form submissions in WordPress.

You can prevent duplicate entries in Formidable Forms contact forms and advanced forms by enforcing unique fields such as email address, phone number, or text fields.

This feature works with Formidable Forms native fields, requires no additional configuration, and does not affect form design or user experience.

Does not affect form design or user experience.

NEW: Elementor Forms Support

Duplicate Killer now fully supports Elementor Forms.

You can prevent duplicate submissions in Elementor contact forms, lead forms and popups by enforcing unique values such as email or phone number.

This feature works with Elementor’s native form widget and requires no additional configuration.

Plugin Integrations

Contact Form 7

• Limit submissions by Email, Phone or Text fields
• Custom validation message for duplicate entries
• Automatically store uploaded files locally

Elementor Forms

• Prevent duplicate submissions on Elementor native forms
• Works with contact forms, lead forms and popups
• Seamless integration without modifying form structure

Forminator

• Select unique fields (Email, Phone, Text)
• Warn users when a value has already been submitted

WPForms Lite

• Prevent duplicate entries without changing form layout
• Clean and simple validation messages

Breakdance Page Builder Forms

• Prevent duplicate submissions on Breakdance native forms
• IP-based validation for cleaner data
• Fully compatible with Breakdance UI

Free vs Pro

Free Version

• Duplicate protection for supported form plugins
• One global error message for all forms
• Basic duplicate detection (Email, Phone, Text)
• Elementor Forms support

Duplicate Killer PRO

• Individual settings for each form
• Custom error message per form
• Limit submissions by IP per form
• Unique entries per user (cookie-based, per form)
• Display submission count per form
• Advanced duplicate protection controls