Merchant Identification Number (MID)

The merchant identification number (MID) is a unique identifier assigned to a merchant account. The MID is used by the various stakeholders to identify the account throughout the course of the transaction processing workflow.

When the processor approves the merchant account application, the merchant will typically receive a VAR (value-added reseller) sheet that lists the MID.

Learn more about merchant identification numbers in this blog post.

More Industry Terms

Ready to Start Preventing
& Fighting


Set up your
demo experience.

analytics-imac@2x analytics-imac

Sign up for
news & updates.

©2023, Equifax Inc., All rights reserved. Equifax and the Equifax marks used herin are trademarks of Equifax Inc. Midigator is a trademark of Equifax Inc. Other product and company names mentioned herin are the property of their respective owners.