MID Definition.
Merchant ID: the identifier of a merchant’s acceptance agreement with its acquirer. A single merchant often holds several, by channel (in-store or e-commerce), currency, brand, or legal entity. It is the unit scheme monitoring programs work with: fraud and chargeback ratios are calculated per MID.
See also
Where this term appears
GuideThe four-party modelGuideThe role of banksGuideProtecting customer funds, and what happens when the institution failsGuidePayments in the Nordic countriesGuidePayments in Norway and DenmarkGuidePayments in Mexico and the AndesGuidePayments in Oceania and CanadaGuideUS debit and Durbin routingGuidePayments in Southeast AsiaGuidePayments in IndiaGuidePayments in IndonesiaGuidePayments in the Philippines