Glossary
A merchant's glossary of chargeback and fraud prevention terms – clear definitions for disputes, reason codes, and payment industry jargon
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Chargeback Alerts
A standard chargeback can reach a merchant days or weeks after the cardholder contacts their bank, when the options are narrow. Chargeback alerts shift that timing by flagging a transaction while the merchant can still act on it. Here is how that works, how it differs from a regular notification, and who offers it.
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Chargeback Analyst
A chargeback analyst reviews disputed card payments and helps decide what happens next: accept the dispute or challenge it. Some work in-house at merchants, while others sit at an issuing bank, an acquirer, a payment processor, or a fintech. A merchant chargeback analyst stands on the seller’s side and weighs whether each dispute should be accepted or contested through representment, the step where the business submits evidence that the sale was legitimate.
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Chargeback Rate (Chargeback Ratio)
A chargeback percentage looks like a simple number, but card networks do not all build it the same way. The formula, measurement period, and transactions counted can all change what the final percentage means for a merchant.
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Chargeback Reason Code
When a dispute arrives, the most useful detail is not the amount or the customer’s name. It is the chargeback code attached to the case. That short label tells you what the cardholder’s bank claims went wrong, and it shapes what you gather, what you argue, and how you frame your reply.
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MATCH code
Merchant accounts can end for plenty of reasons, but some terminations carry consequences beyond the current provider. When an acquiring relationship ends and a qualifying risk condition is present, the merchant may be reported to MATCH Pro. The code attached to that record tells future acquirers why the listing was made.
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MID (Merchant Identification Number / Merchant ID)
A merchant identification number (MID) is the code used to recognize a merchant account. The acquiring bank or payment processor usually assigns it when the account opens. Think of it as the account’s address inside card processing. It tells banks and card networks which merchant a sale belongs to. In simple terms, that is the merchant identification number definition.
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PAN (Primary Account Number)
A primary account number (PAN) is what most people call a “card number.” It identifies a credit, debit, or prepaid card account and may appear on the card itself. The number is also stored in the card’s magnetic stripe or EMV chip. In payment processing, the term primary account number means the identifier used to connect a transaction to the correct issuer and card account.
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Processing
Processing is everything that happens to move money from a customer’s card to a seller’s account after a purchase. At checkout, the customer sees only a brief pause. Behind it, the payment gateway sends the request to the payment processor. From there, it moves through the acquiring bank and card network to the issuing bank, which returns a response.
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VAMP (Visa Acquirer Monitoring Program)
The VAMP (Visa Acquirer Monitoring Program) is how Visa watches for payment activity that looks riskier than normal, from abnormal fraud and dispute levels to card-testing patterns. The VAMP program runs every month, and it applies at two levels: an acquirer’s whole portfolio and each merchant inside it.
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Verifi
The Verifi company builds dispute-management and chargeback-prevention technology. The connection behind searches for Verifi Visa dates to 2019, when Visa acquired the company. Ownership doesn’t box the products in, though, as several of them also cover other card brands.
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