What is Ecommerce Fraud?

Ecommerce fraud is the catch‑all for fraud in online checkouts and post‑purchase flows: card‑not‑present hits, account takeovers, coupon and promo farming, triangulation schemes with stolen payment details, refund and return gaming, even reshipper “drop” networks. Attackers use a combination of breached cards, clean proxies, device emulators, and clever social engineering. They test small—think test charges, low‑risk SKUs—then go fast once the door opens.

Your logs murmur: mismatched AVS/CVV in “clean” IP and device space, micro‑auth waves from BIN corridor to corridor, geovelocity that can’t possibly be true, device fingerprints appearing behind fresh email accounts, last‑minute changes to shipping addresses to divert to mules. Disputes accumulate in resell‑heavy categories like gift cards, electronics, digital goods. Support teams are swamped; marketing thinks cohorts are rotting.

Turn the knobs, not the revenue off: enforce CVV and score AVS; selectively enable 3DS in risky corridors; build device graphs and score BIN/country corridors; throttle enumeration patterns; and add step‑ups only when the story gets fishy—credential or shipping address changes, high‑value orders. For larger exposures—payouts, B2B, bulk buys—tie people to their devices with comprehensive identity verification. Secure payment perimeters and representment decisions with hard evidence per payment fraud prevention.

Goal: enable good customers to fly while fraudsters hit the gravel. Fine‑grained friction trumps broad‑brush walls. Measure, learn, tighten; rinse, repeat.