Duplicate Killer now supports Fluent Forms
If you’re using Fluent Forms on your WordPress website and need a reliable way to prevent duplicate submissions, Duplicate Killer now offers full support. Whether you’re collecting contact requests, quote…
Tag: submission
What is the “Set Error Message” field in Duplicate Killer
Quick FAQ What happens when Duplicate Killer detects a duplicate?The plugin blocks the submission and displays a message to the user. Can I customize that message?Yes. You can fully change…
WordPress Form Resubmits on Refresh: How to Prevent It
A common WordPress forms issue is resubmission on refresh. A user submits a form, then refreshes the page (or returns using the back button) and the browser tries to submit…
Contact Form 7 Sending Emails Twice? Here’s the Real Fix
If your Contact Form 7 emails are being sent twice, you’re not alone. This issue is common on WordPress sites with caching, optimization plugins, unstable networks, or multiple integrations firing…
Functional Cookies in WordPress: What Agencies Must Know
Modern WordPress websites rely heavily on forms: contact forms, lead generation, support requests, registrations, and onboarding workflows. One of the most common and costly issues agencies face is duplicate form…
Duplicate Killer Cookie Architecture for Preventing Duplicate Submissions in WordPress
This document provides a deep technical explanation of how the Duplicate Killer WordPress plugin implements cookie-based logic to assist with duplicate form submission prevention. It is written for developers, agencies,…
How Duplicate Killer Cookie Protection Works (and How to Stay GDPR-Compliant)
Duplicate submissions are one of the most common issues in WordPress forms. They affect data quality, analytics, lead management, and automation workflows. To address this problem without adding friction (like…
Best Practices for Preventing Duplicate Submissions Without UX Friction
Preventing duplicate submissions without UX friction is one of the biggest challenges in WordPress form design. Many website owners attempt to block duplicates using aggressive methods that frustrate real users…
How to Prevent Duplicate Booking Form Submissions in WordPress
Duplicate booking form submissions cause overbooking, scheduling conflicts, and lost revenue. This issue affects service businesses, consultants, clinics, and agencies. Why Duplicate Booking Submissions Happen Users refresh pages, submit forms…
How to Stop Duplicate Marketing Form Submissions in WordPress
Duplicate marketing form submissions are one of the fastest ways to destroy campaign performance. If your WordPress forms allow the same email or phone number to be submitted multiple times,…
