Max Kruger
Founder & CEO
Max is the founder of Fidro. He builds developer tools for fraud prevention and has spent the last decade working on payment security, email validation, and risk scoring systems.
Articles by Max Kruger
How to Reduce Your Stripe Chargeback Rate Below 1%
Exceeding 1% chargeback rate triggers Visa and Mastercard monitoring programs with fines up to $25,000/month. Here's a practical checklist for keeping your rate well below the threshold.
March 17, 2026
What Are Disposable Emails and Why You Should Block Them
Disposable emails let users create throwaway inboxes that bypass your verification flows. Learn how they work, why they damage your business, and how to detect them in real time.
March 10, 2026
How Chargeback Fraud Works and How to Prevent It
Chargeback fraud costs merchants billions annually. Learn the mechanics of friendly fraud, first-party fraud, and true fraud — and the practical steps to prevent chargebacks before they happen.
March 6, 2026
Email Validation API Integration Guide: Best Practices for Developers
A practical guide to integrating email validation into your signup flow. Learn where to validate, how to handle edge cases, and the patterns that reduce fraud without hurting conversion rates.
March 1, 2026