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.
Velocity Checks: Catching Rapid-Fire Fraud
Velocity checks flag suspicious bursts of activity — the same IP, card, or email hammering your checkout. Learn the signals that matter and how to set thresholds that stop fraud without hurting real shoppers.
Device Fingerprinting for Shopify Fraud Detection
Device fingerprinting spots the same actor behind many fake identities — even when they clear cookies and swap IPs. Learn how it works, what it catches, and how to use it responsibly on your Shopify store.
Email Domains as Fraud Signals
The email on an order tells you more than you think. Disposable domains, plus-addressing tricks, and domain age all hint at risk. Learn to read email signals and score them on your Shopify store.
The Cooling-Off Period in EU E-commerce, Explained
What is a cooling-off period, why online sales differ from in-store, and which myths trip sellers up? A clear guide to the EU 14-day right of withdrawal.
What Does AVS Mismatch Mean? AVS & CVV Checks on Shopify
AVS and CVV checks quietly guard every card payment. Learn what the match codes mean, how to read a mismatch, and how to handle failures without turning away good customers.
The Shopify Fraud Prevention Glossary
A skimmable reference to the fraud terms every Shopify merchant runs into — AVS, CVV, chargebacks, representment, friendly fraud, velocity, ATO, BIN, 3DS, MCC, and more.
The 12 Most Common Types of Shopify Fraud in 2026
A field guide to the 12 fraud patterns hitting Shopify stores this year — card testing, COD non-acceptance, friendly fraud, triangulation, promo abuse, and more.
An EU Compliance Glossary for Online Sellers
Selling into the EU means meeting a wall of acronyms and legal terms. This glossary defines 25+ of the most important ones, from the right of withdrawal to the Omnibus Directive, in plain language for online sellers.
Friendly Fraud vs Criminal Fraud — Why Your Defense Needs to Be Different
Friendly fraud is now the fastest-growing chargeback category. It needs a totally different defense than criminal fraud. Here's how to tell them apart and stop both.
How Shopify's Built-In Fraud Analysis Works (And Where It Stops)
Shopify's native fraud filter is useful — but it scores post-checkout, can't see across orders, and never acts. Here's where it plateaus and what to layer on top.
Fraud Risk Score Explained — How It's Calculated and What to Do With It
A fraud risk score is a probability estimate, not a verdict. Here's what goes into it, why two systems disagree on the same order, and how to operationalize it.
The True Cost of Shopify Fraud (And Why It's a Margin Problem, Not a Security One)
One $120 fraud order costs you $233 — almost 2x order value. Here's the full P&L of fraud on Shopify and why it's eating your margin invisibly.
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