Matt King
Developer Advocate
Matt writes about fraud prevention, API integration patterns, and developer security. He focuses on practical guides that help engineering teams ship safer products.
Articles by Matt King
How to Detect Disposable Emails in Your Signup Flow
A practical implementation guide for adding disposable email detection to your registration form. Covers API integration, response handling, user messaging, and the edge cases that trip up most implementations.
February 28, 2026
Free Email Providers vs Disposable Emails: What's the Difference?
Gmail, Yahoo, and Outlook are free but legitimate. Mailinator, Guerrilla Mail, and 10MinuteMail are disposable and risky. Learn how to tell them apart and why the distinction matters for fraud prevention.
February 18, 2026
Email Validation for SaaS: The Complete Guide
Everything SaaS teams need to know about email validation — from basic format checks to advanced disposable detection, risk scoring, and integration patterns that protect revenue without killing conversions.
February 5, 2026
The True Cost of Fake Signups: What We Found Analyzing 10,000 Accounts
We analyzed 10,000 SaaS signups to measure the real impact of fake accounts. The results: 23% used disposable emails, they cost 4.7x more in infrastructure per dollar of revenue, and they destroyed conversion metrics.
January 22, 2026
What Is a Risk Score? How Fraud Risk Scoring Works
A risk score is a numerical value that represents the likelihood a user or transaction is fraudulent. Learn how risk scores are calculated, what signals they incorporate, and how to use them in your application.
January 8, 2026
IP Intelligence: How to Detect VPNs, Proxies, and Tor at Signup
IP intelligence reveals whether users are masking their location with VPNs, proxies, or Tor. Learn how IP analysis works, when anonymization is a fraud signal, and how to use it without blocking legitimate users.
December 18, 2025
Free Tier Abuse: How to Protect Your SaaS Without Hurting Real Users
Free tiers drive growth but attract abuse. Learn how to detect multi-account fraud, disposable email signups, and resource exploitation while keeping the experience smooth for legitimate users.
December 5, 2025
Stripe Radar vs Custom Fraud Prevention: When You Need Both
Stripe Radar provides baseline fraud protection, but it has blind spots. Learn when Radar is sufficient, when you need additional fraud detection, and how to layer them effectively.
November 20, 2025
How to Fight a Stripe Chargeback (and Win)
A practical guide to responding to Stripe chargebacks with compelling evidence. Learn which dispute reasons you can win, what evidence to submit, and how to automate the process.
November 5, 2025
Pre-Transaction Fraud Detection: How to Catch Bad Actors Before Payment
Pre-transaction fraud detection evaluates risk signals before payment is processed. Learn why validating emails, IPs, and geolocation before checkout prevents chargebacks and saves revenue.
October 20, 2025
Adding Email Validation to Laravel: A Step-by-Step Guide
Learn how to integrate real-time email validation into your Laravel application using a custom validation rule, service class, and queue job for async processing.
October 1, 2025
Building a Fraud Prevention Middleware in Node.js
A step-by-step tutorial for building Express middleware that validates emails, checks IPs, and scores risk before requests reach your application logic.
September 15, 2025