Duplicate Killer prevents repeated submissions in WordPress forms. Choose which supported fields must be unique, such as an email address, phone number or text value. When a matching value has already been saved by Duplicate Killer, the plugin blocks the repeated submission and displays your message. Use it to reduce duplicate leads, repeated contact requests and multiple registrations with the same email address. No CAPTCHA is required for duplicate checks. Reduce repeated form spam without adding CAPTCHA Some unwanted submissions repeat the same email address, phone number or other field val...
Read the full description on WordPress.org →
