An identification number assigned to each member merchant of an acquiring
organization,
such as a financial institution, Independent Sales Organization (ISO), Merchant
Service
Provider (MSP) or processor. MID identifies the merchant throughout the payment
cycle
(transaction, settlement, refund, chargeback) An account ownership verification
tactic
where a small amount is temporarily deposited into
a user’s bank account. The user must confirm the amount received. Once the user is
verified,
the microdeposits will be withdrawn from their account.