Order-time records decide the chargeback that arrives six weeks later.
The problem is mostly one of timing. The evidence that wins disputes (the AVS result on the original authorization, the device fingerprint at checkout, the customer's login activity in the days after delivery) is fresh and easily exportable when the order goes through, and gone or hard to retrieve six weeks later when the chargeback lands.
The merchants who consistently win disputes are rarely the ones with the most experienced experts. They are the ones whose systems store the right fields against every order, automatically, at the moment the order is placed. AVS results live in the payment processor's transaction record, never joined to the order in the merchant's own system. Device fingerprints decay out of analytics platforms after 30 to 90 days. Post-order login activity is captured by the storefront, but no default join links it back to the original order. Each of these is retrievable in principle and inaccessible by the time a chargeback notification arrives.
Building this is straightforward, because most order management platforms expose the webhooks already. A webhook firing at order creation and at fulfillment can push the six or seven fields you actually need into a long-term table indexed by order. A few hours of engineering work, written once, repays itself the first time a dispute requires the records, and every quarter thereafter.