***Changes made on 08/23/2019 are delineated below in Red.***
Updated MessageCategory notes and values
| MessageCategory | Identifies the message category for Payment or Non-Payment transaction. Set to NPA or Merchant Profile configured. Possible Values: 01 - PA 02 - NPA NOTE: EMV® 3-D Secure version 2.1.0 supports values 02. Version 2.2.0 supports values 01 and 02. This value can be set in the API on each transaction or within the client's Merchant Id. | C | Required for Merchant Initiated transactions. | N(2) |