Knowing the chargeback process is easy; submitting the right documents before the deadline is not. This playbook breaks down reason codes by dispute type, gives an evidence checklist you can reuse, and explains how Visa and Mastercard prevention tools plus 3DS liability shift change the maths.
Many teams treat 3DS, risk rules and chargeback handling as three things to optimise separately, and the metrics get worse the harder they optimise - because they are three stages of one decision chain. Get the order or the decision rights wrong and tuning any one layer pushes the other two the wrong way. This article covers the division of work, the correct sequence, the real preconditions for liability shift, and how to derive the combination from chargeback structure.