Stop Chargeback Fraud, Card Testing & Friendly Fraud
E-commerce fraud has moved beyond stolen cards. Coordinated fraud rings use residential proxies to look like real customers until the chargebacks hit. Maskbreak catches them before checkout.
What E-Commerce platforms face in 2026
Friendly fraud & chargeback rings
Coordinated groups of accounts use residential proxies to appear as unrelated customers, make purchases, then dispute them all simultaneously. Network-layer checks can see 400 different "real" users — Maskbreak links them to one device cluster.
Card testing at scale
Bots test stolen card numbers with micro-transactions across your checkout flow. Each bot rotates IPs and device fingerprints — but behavioral and device signals expose the automation.
Account takeover & loyalty point theft
Credential stuffing bots take over customer accounts to steal loyalty points, gift card balances, and saved payment methods.
Promo & coupon abuse
Automated accounts claim single-use promo codes repeatedly, rotating emails, devices, and proxies to bypass per-account limits.
What Maskbreak does for you
- Recognize returning fraudulent devices at checkout — same device, new account, new card
- Detect card testing bots via behavioral and device signals
- Stop account takeover without adding login friction
- Identify proxy-masked promo abuse across multiple "accounts"
- Integrate in 5 minutes — works alongside Stripe, Shopify, WooCommerce
saved in 90 days in our illustrative composite scenario of an e-commerce brand catching a coordinated chargeback ring
[ Read Full Case Study ]Where the check goes
The two call sites that pay for themselves fastest: checkout (before the payment request leaves your server) and account creation. Screening the session before your payment gateway sees the card keeps card-testing bots out of your authorization rate, your fraud score with the acquirer, and your per-attempt fees.
// Screen the session before the card ever reaches your PSP
const verdictRes = await fetch('https://maskbreak.com/v1/evaluate', {
method: 'POST',
headers: {
'Authorization': 'Bearer ' + process.env.SENTINEL_KEY,
'Content-Type': 'application/json'
},
body: JSON.stringify({ token: req.body.sentinel_token })
});
const risk = await verdictRes.json();
if (risk.decision === 'block') return res.status(403).json({ error: 'Order blocked' });
if (risk.decision === 'review') flagForReview(risk.reasons);The signals that matter for e-commerce
Card testing before the gateway. Carders validate stolen card lists against real checkouts using residential proxies and randomized timing — from the network side each attempt looks like a new shopper. The tell is the device layer: automation artifacts, spoofed fingerprints, and the same hardware reappearing behind "different" customers. Catching that before the authorization request is the difference between a blocked bot and a fraud-score problem with your acquirer.
Guest checkout isn't anonymous to the device graph. Serial refund abusers and coupon farmers rotate emails and use guest checkout to look like first-time buyers. Hardware-level identity ties those sessions together across weeks, without requiring accounts or cookies that privacy tools clear.
Checkout automation with stealth patches. Sneaker-drop and inventory-hoarding bots run Playwright and Puppeteer behind residential IPs that pass every network check. The device integrity signals — headless artifacts, input timing, environment tampering — are where they stay visible.
Layered evidence beats single signals. Any one signal can innocently fire — a VPN alone is often a privacy-conscious customer. Maskbreak returns each signal separately: network origin (proxy / VPN / datacenter), automation and tampering flags, and device identity reappearing behind "different" customers (device.times_seen, device.linked_accounts). A residential-proxy checkout from a device already linked to three accounts scores very differently from a VPN alone.
Common questions
Start protecting your e-commerce platform
Free tier: 1,000 requests/hour. No card, no expiry. Detects residential proxies, antidetect browsers, and AI bots.