⚠ Fraud Is a Permanent Arms RaceModerate threat

Fraud prevention is a genuine data-scale advantage, but it sits in a permanent arms race that no one ever wins outright, so it is an advantage that must be continuously re-earned rather than banked. Fraudsters are sophisticated, well-resourced, and relentlessly adaptive: every improvement in detection prompts a countermove, every new payment method and channel opens new attack surfaces, and the patterns shift constantly. Adyen's network-wide data gives it a real edge in the fight, but the edge is never secure — it requires perpetual investment in detection, machine learning, and response just to stay ahead of adversaries who are themselves using ever-more-sophisticated tools (including, increasingly, AI). A fraud-prevention advantage is a treadmill, not a fortress.

The arms race is shared, too. Rivals at scale — and above all the card networks, which sit at the center of the global payment flow and see even more data than any single processor — invest enormously in fraud prevention, so Adyen competes on this dimension against equally-motivated, data-rich players, and the whole industry advances together. A serious fraud breach or a period of falling behind the fraudsters would be costly not only in losses but in the merchant trust that is central to Adyen's value. Adyen's scale, data, and execution make it genuinely strong in fraud management, and this is a real source of merchant value and differentiation from smaller players. But an investor should recognize that fraud prevention is inherently a perpetual, industry-wide battle in which advantages are temporary and must be endlessly renewed against adapting adversaries and matched against equally-capable rivals — a real strength that strengthens the narrow moat, but one that can never be a durable, defensible wall, because the enemy never stops adapting and the other giants never stop investing¹.