Chargeback
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A forced reversal of a card transaction, initiated by the issuer on the cardholder behalf, typically because the transaction is disputed as fraudulent, unauthorized or not as described. Chargebacks carry fees and, above brand thresholds, can put a merchant into a monitoring program or cost it card acceptance. Sustained chargeback volume is often the first outward sign of a card data compromise, which is why chargeback trends are watched as a fraud indicator rather than purely as a finance matter.