The numbers that matter
Two figures decide whether a processor considers you a risk: the chargeback-to-transaction ratio and the absolute number of disputes. A common programme threshold is 1.0% of transactions in a month (some networks use 0.9%, and a lower limit applies to high-risk accounts under monitoring), plus a minimum count — often 100 — before enforcement kicks in. The consequence is not a fine but a reserve requirement or a frozen payout, which is far more damaging than the disputed revenue.
Why customers file disputes
Roughly half of disputes are service problems rather than fraud, and most are avoidable:
- An unfamiliar billing descriptor, so the customer does not recognise the charge
- Delivery slower than expected, or no tracking information
- The item arrived damaged, wrong or not as described
- A refund requested and not processed within the expected window
- Support that could not be reached or did not reply
- Genuine fraud on a stolen card, which shows up as a cluster of orders on similar cards or addresses
Evidence and deadlines
A dispute arrives with an evidence-due date, typically 7–20 days depending on the reason. Missing it means automatic loss. Useful evidence: proof of delivery with signature or GPS, tracking showing delivery to the cardholder's address, the order and checkout records, communication with the customer, refund policy acceptance, and prior transaction history with the same customer. Submitting screenshots rather than readable documents is the most common reason a winnable case is lost.
Prevention beats representment
Even a 40–50% win rate on disputes leaves the rest as pure loss plus fees, so prevention has the better return. Fix the descriptor so customers recognise the charge, email tracking proactively, publish and honour a clear refund policy, answer support within a day, and add address verification and velocity checks at checkout for fraud clusters.
Monitoring the ratio before it becomes a problem
Compute your ratio weekly: disputes in the last 30 days divided by transactions in the same period, compared against the 0.9–1.0% line. Pair it with the nearest evidence deadline — a dispute you have not yet responded to is a loss in progress. A small internal dashboard of ratio, open disputes and the next deadline is enough to keep a store out of monitoring programmes.
When it is worth fighting
Fight disputes above about $50 where you have delivery evidence and the customer never contacted you first; that combination wins often. Skip the low-value, no-delivery-evidence cases and refund them instead, then fix the delivery problem that produced them. Blanket-fighting every dispute is how merchants end up submitting weak evidence and losing the ones that mattered.