Merchant Identification Number (MID)

Merchant Identification Number (MID)

Your merchant identification number (MID) is your business’s unique identifier with your merchant account provider and is used in all dealings you have with them. This e-guide provides basic information about MIDs that every business owner should know.

Before you can start accepting credit cards, debit cards and other types of payment cards, you must establish a merchant account with a processor like TransFirst®, which has been in the business of electronic payments processing since 1995. We offer a full line of processing solutions — including POS retail, Internet, wireless and mobile — and we are dedicated to bringing state-of-the-art technology, personalized customer service and cost-effective pricing to all our clients.

Now, get ready to learn more about the role of the MID by downloading our free e-guide on the subject.


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and secure.We only
accept U.S.-based
businesses. We do not
accept adult businesses.

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TransFirst, LLC is a registered ISO/MSP of:
Wells Fargo Bank, N.A., Walnut Creek, CA
Synovus Bank, Columbus, GA