{"id":4580,"date":"2023-01-13T08:51:13","date_gmt":"2023-01-13T08:51:13","guid":{"rendered":"https:\/\/ccbill.com\/kb\/?p=4580"},"modified":"2023-05-11T11:34:34","modified_gmt":"2023-05-11T11:34:34","slug":"merchant-id","status":"publish","type":"post","link":"https:\/\/ccbill.com\/kb\/merchant-id","title":{"rendered":"What Is an MID? Merchant Identification Numbers Explained"},"content":{"rendered":"\n

Introduction<\/p>\n\n\n\n

Banks, payment processors<\/a>, and card networks continuously monitor and analyze electronic payments to guarantee the integrity of each transaction. Every transaction event leaves an electronic trail that contains unique designations that identify the participants in the payment process and their actions.<\/p>\n\n\n\n

An MID (Merchant Identification Number) is the merchant\u2019s designation. It identifies the merchant and is essential for facilitating transactions and resolving payment disputes.<\/p>\n\n\n\n

Find out how MIDs work and if you need one to accept online payments.<\/p>\n\n\n

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\"Merchant<\/figure><\/div>\n\n\n

What Is a Merchant ID (MID)?<\/h2>\n\n\n\n

A Merchant Identification Number (MID) is a unique numerical code acquiring banks assign to merchant accounts. The MID serves as an identifier that establishes that a transaction was initiated with a specific merchant.<\/p>\n\n\n\n

Financial institutions and other participants in the payment process collect, cross-reference, and validate MIDs along with customer information and additional transactional metadata (i.e., Transaction ID, BIN, MCC<\/a>) before authorizing a transaction.<\/p>\n\n\n\n

Do All Businesses Need a MID?<\/h3>\n\n\n\n

Merchants who open an account with a payment service provider (PSP), like CCB<\/a>i<\/a>ll<\/a>, Stripe, or Braintree, do not need an MID to accept payments.<\/p>\n\n\n\n

The PSP has an MID and is the nominal merchant in the payment processing workflow. The transactions a PSP processes for its various clients (merchants) all have the same MID.<\/p>\n\n\n

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\"The<\/figure><\/div>\n\n\n

Merchants should not confuse internal designations they receive from their PSP, such as a merchant account number, with an MID. Payment service providers use internal designations to process and monitor transactions and reconcile funds accordingly. These designations are only valid within the PSPs systems.<\/p>\n\n\n\n

Businesses that want to accept payments directly from customers, without using third-party providers, need to open a processing account with their acquiring bank and obtain an MID.<\/p>\n\n\n\n

How Do MIDs Work?<\/h2>\n\n\n\n

Merchant acquirers<\/a> and the customer\u2019s bank (issuer) rely on unique identifiers, like MIDs, when determining whether a transaction should be approved or denied, or if requires additional authentication.<\/p>\n\n\n\n

For example, issuers may charge customers added fees for using their payment cards abroad. The MID is one of the parameters issuers reference to determine the merchant\u2019s country of origin.<\/p>\n\n\n

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\"Merchant<\/figure><\/div>\n\n\n

A simplified example of a card payment flow shows why MIDs are integral to the payment process:<\/p>\n\n\n\n

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  1. When a customer initiates a payment, the cardholder\u2019s data, the MID, and other transactional data are transferred to the acquirer.<\/li>\n\n\n\n
  2. The acquiring bank validates the data, including the MID, and sends an authentication request to the customer\u2019s issuing bank.<\/li>\n\n\n\n
  3. The issuing bank verifies the customer\u2019s identity and checks if the customer has enough money in their account.<\/li>\n\n\n\n
  4. Issuers approve or decline the transaction and forward this information to the acquirer.<\/li>\n\n\n\n
  5. If the transaction is authorized, the funds are deposited to the merchant\u2019s processing account using the MID as the identifier.<\/li>\n<\/ol>\n\n\n\n

    Acquirers and issuers cannot authenticate or authorize transactions without an MID. Businesses need to obtain an MID to accept payments, either by opening a processing account, or by using the services of a PSP.<\/p>\n\n\n\n

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    Note:<\/strong> Learn everything you need to know about payment processing by referring to our article What Is a Payment Processor?<\/a><\/p>\n\n\n\n

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    How to Get a Merchant ID for Payment Processing?<\/h2>\n\n\n\n

    Merchants receive an MID when they open a merchant account<\/a> with an acquiring bank. The bank performs a KYC<\/a> check and asks potential merchants to provide valid documentation to verify the legal status of their company. The acceptable forms of identification often include:<\/p>\n\n\n\n