Chargeback reason codes, and how to actually win a representment
The four families of chargeback reason codes, what evidence wins each one, what belongs in a representment packet, and which disputes are worth fighting at all.
Read →AVS and CVV response codes, and which ones are worth declining
What each AVS and CVV response code means, which ones justify a decline, which ones are silence rather than failure, and why sending both lowers your interchange.
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