Message Type Indicator (MTI)

Format: n4

Description: Indicates the message type of the request/response message.

Request MTI

Response MTI

Transaction Description

1100

1110

Pre-Authorisation / Incremental Pre-Authorisation

1200

1210

Sale

1200

1210

Pre-Authorisation Completion

1220/1

1230

Refund / Force / DCC Quote Rejection (including repeats)

1420/1

1430

Sale Reversals (including repeats)

1304

1314

Exchange Rate Request

1305

1315

DCC Inquiry Rate Request

1500

1510

Reconciliation / Batch Closure Message

1804

1814

Network Management Message