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Introduction to Level II and Level III Processing

For business to business customers, Level II and Level III processing can provide lower interchange rates in exchange for providing more information during a transaction.
Level II processing includes additional customer and tax information for the transaction.
Before you can use Level II processing with American Express, you must contact American Express and obtain approval to process Level II transactions.
Level III processing includes line-item data for each transaction. See Supported Processors and Card Types: Level II and Supported Processors and Card Types: Level III for lists of the supported card types for your processor.
This document provides guidelines that indicate which fields are required to obtain the best interchange rates. These guidelines are based on industry information available at the time of publication.
recommends that you contact your acquirer for the most current information requirements, as these requirements can change at any time.