Lesson

How do marketplaces fight fraud?

Fraud in marketplaces and e-commerce is becoming more concentrated, coordinated, and difficult to detect. As platforms onboard more buyers and sellers, expand across regions, and introduce new payment methods or AI-driven features, fraud risks evolve across the full user lifecycle.

This lesson explains the main fraud threats marketplaces face, from fake accounts, account takeover, payment fraud, card testing, and refund abuse to fake sellers, collusion, and promotion abuse.

You’ll also learn why effective fraud prevention requires layered controls across onboarding, transactions, payouts, disputes, and ongoing user behavior.

Matteo Gamba

Fintech Industry Expert

Matteo Gamba is a senior payments and product leader with deep expertise in fraud prevention, payments strategy, and global commerce. His background spans Wayfair, Wise, and Rocket Internet, where he led payment and fraud initiatives across large-scale e-commerce and fintech environments. At Wayfair, Matteo spent nearly a decade building and scaling global payments and fraud capabilities, eventually serving as Head of Product for Global Payments and Fraud. His work covered fraud systems, orchestration, vendor strategy, UX, and payment optimization across multiple markets and channels. He also serves in advisory roles within the payments industry, including the Merchant Risk Council and the Merchant Payments Ecosystem, bringing a strong strategic perspective on how payments and fraud can drive both protection and business performance.

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Why watch this lesson?

Watch this video lesson to understand how fraud unfolds across marketplaces and e-commerce platforms, and why lower overall fraud rates do not always mean lower business risk. The session shows how refund abuse, chargebacks, fake sellers, account takeover, and coordinated multi-accounting can create financial losses, operational pressure, and trust issues at scale.

You’ll learn why marketplace fraud prevention needs to go beyond one-time checks and combine identity verification, business verification, device intelligence, behavioral analysis, transaction monitoring, risk scoring, and manual review. The lesson also explains how platforms can apply stronger controls without adding unnecessary friction for legitimate buyers and sellers.

This video lesson is part of the full Fraud Prevention course, where you can explore how fraud works across different industries, how attacks evolve across the user lifecycle, and how teams can detect, investigate, and prevent abuse while supporting growth.

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