Mastercard introduces new Merchant Advice Codes

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Effective date: November 7, 2023

Mastercard is introducing two new Merchant Advice Code (MAC) values for authorization responses. The new MAC values will inform merchants that the card product is a consumer non-reloadable prepaid card or a consumer single-use virtual card number. This information will help merchants improve card-not-present transaction management by properly identifying transactions that should not be reattempted.

Depending on the technology used to process transactions, one or more actions, such as contacting the independent software vendor (ISV), re-coding to First Data specifications (if coded directly), and updating terminals or other products and applications, may be necessary and at an added fee.