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ISO 8583
F124 (Private Additional Data) contains additional information specific to the transaction, such as Card Update Failure Code and Status, cardholder name in money transfers, and keys in network management messages.
ISO 8583
F64 — Message Authentication Code (MAC): verifies the origin and text of the message between the sender and the receiver.
ISO 8583
F39 - RESPONSE CODE: This is the code showing whether the transaction was approved or declined. It is 2-digit alphanumeric. Typically 00 is sent when approved, and a decline reason code is sent when declined.
ISO 8583
Currency information for card transactions is sent in fields F49, F50 and F51. The ISO currency values that can be sent in field F49, which carries the original currency value, are listed below.
ISO 8583
F35 TRACK-2 DATA: The values printed to the card's Track 2 data in ISO 7813 format, including field separators and start/end sentinels, but excluding LRC (Longitudinal Redundancy Check) characters. It is 37 characters long.
ISO 8583
F34 — Primary Account Number, Extended: this field is filled when the card number cannot be placed in F2 because it is longer than 19 digits or contains special characters.
ISO 8583
F14 - DATE, EXPIRATION DATE: the expiration date printed on the card by the issuing bank, a 4-digit numeric value in YYMM format. See how it's checked and why the YYMM order matters.
ISO 8583
F47-ADDITIONAL DATA (NATIONAL) is the field reserved for domestic additional information. In Turkey, it carries the BKM Unique ID in authorization transactions and data specific to KKPT (card-to-card transfer) transactions.
ISO 8583
F22 - POINT OF SERVICE ENTRY MODE: This field holds how the transaction was performed via the POS/ATM and the PIN entry capability of the POS device. The first 2 digits show how the transaction was performed, and the last digit (shown as x) carries the POS's PIN entry capability. Numeric...
Online & Authorization
F53 - PIN Encryption Control Information. When online PIN data is present, sending the F53 value is mandatory, except when DUKPT information is carried in Field 63, Tag 01. F53 consists of the following components.
ISO 8583
F25 - POINT OF SERVICE (POS) CONDITION CODE is the field that defines the condition under which a POS transaction was performed. Possible values include 00 Normal presentment, 01 Customer not present, 02 Unattended terminal, and more.
ISO 8583
F60-ADVICE REASON CODE: Used to indicate the specific purpose of an advice/reversal message. It is 60 characters long.