BlocklyFraud prevention fundamentals
The core concepts behind e-commerce fraud prevention — risk signals, AVS and 3-D Secure, chargeback reason codes and how fraud scoring decides what to block.
CGNAT & Mobile Carrier IPs: Block or Allow?
Thousands of mobile shoppers can share a single IP address thanks to carrier-grade NAT. Learn how CGNAT works, why blocking a mobile IP can shut out hundreds of real customers, and how to filter fraud without over-blocking.
The True Cost of a Chargeback Fee
The $15 chargeback fee is the smallest part of what a dispute really costs you. Between lost goods, shipping, staff time, and ratio damage, a single chargeback can wipe out the profit from a dozen good orders.
The Consumer Rights Directive: A Merchant Overview
The EU Consumer Rights Directive sets the ground rules for selling online to European shoppers. Here's a plain-language map of your core duties — from pre-contract info to the right of withdrawal.
Disputes vs. Chargebacks: What's the Difference
Merchants use 'dispute' and 'chargeback' interchangeably, but they sit at different stages of the same lifecycle. Understanding inquiries, chargebacks, and Shopify timelines helps you respond faster and win more.
Chargeback Reason Codes Explained
Every chargeback arrives with a cryptic reason code that tells you why the bank reversed the sale. Learn the major card-network families, what each really means, and how to respond.
ASN vs. ISP Blocking on Shopify: What's the Difference
ASN and ISP blocking sound similar but target different layers of the internet. Learn what an Autonomous System Number really is, how it differs from an ISP, and when each is the right lever for stopping fraud on Shopify.
Put these guides
into practice.
Block fraud, customize checkout and stay EU-compliant with apps built by the team behind this blog.
- Free plans
- No code
- Built for Shopify
