Payment fraud is a significant issue for online sellers, with businesses losing billions annually due to fraudulent credit card payments. The impact extends beyond direct financial losses to include chargeback fees, stalled cash flow, increased credit card processing rates, and indirect costs such as fraud prevention wages and solution subscriptions. Payment fraud manifests in two main forms: first-party fraud, often referred to as friendly fraud, and third-party fraud, which involves identity theft. First-party fraud includes chargebacks, coupon abuse, and return fraud, whereas third-party fraud typically involves techniques like card cracking, account takeover, and fraudulent credit applications. To combat these challenges, businesses can employ comprehensive fraud prevention strategies that include payment processing fraud prevention, device identification, bot detection, and fraud scoring. Effective techniques also involve using blocklists, improving transaction descriptors, scrutinizing small transactions, and requiring extra verification. Enhancing chargeback win rates is crucial, as even minor disputes can affect a merchant's risk status with processors. This includes using device intelligence as evidence, maintaining clear policies, and thorough documentation, all aimed at reducing fraud while minimizing friction for legitimate customers.