The type of initial message that was sent. This message type
does not change for the life of the transaction.
What appears on the portal is the plain English description of the
ISO8583 message code.
- 100 - Authorization Request
- 120 - Authorization Advice
- 200 - Financial Transaction Request (Funds Transfer)
- 220 - Financial Transaction Advice (Funds Transfer)
- 400 - Reversal Request
- 420 - Reversal Advice