Message Fields

Message Fields

# Message Fields by Message Type
**Legend:** M = Mandatory, O = Optional, Number = Condition code
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## 0100 - Authorisation Request (Pre-Auth)
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 2 | PAN | LLVAR n ..19 | 07 || 3 | Processing Code | n 6 | M || 4 | Transaction Amount | n 12 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M || 14 | Expiration Date | n 4 | 02 |
### Entry & Identification
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | M || 23 | Card Sequence Number | n 3 | O || 24 | Function Code | n 3 | M || 25 | POS Condition Code | n 2 | M || 35 | Track 2 Data | LLVAR Pz ..37 | 07 || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | M || 49 | Currency Code | n 3 | M || 52 | PIN Data | b 8 | 08 || 53 | DUKPT Key Numbers | b 30 | 10 || 55 | ICC Data | LLLVAR b ..999 | 05 || 60 | Security Data | LLLTLV v ..999 | M || 61 | Encrypted CHD | LLLTLV b ..999 | 07 || 62 | Cardholder Context | LLLTLV v ..999 | O || 64 | MAC | b 8 | 21 || 123 | Non-Payment PIN | LLLTLV v ..999 | 08 || 124 | Second Card Data | LLLTLV v ..999 | 22 || 128 | MAC (alt) | b 8 | 21 |
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## 0110 - Authorisation Request Response
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 3 | Processing Code | n 6 | M || 4 | Transaction Amount | n 12 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M |
### Entry & Response
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | M || 23 | Card Sequence Number | n 3 | 16 || 24 | Function Code | n 3 | M || 25 | POS Condition Code | n 2 | M || 37 | Retrieval Ref Number | an 12 | 15 || 38 | Authorisation Code | anp 6 | O || 39 | Response Code | an 2 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | 15 || 49 | Currency Code | n 3 | M || 53 | DUKPT Key Numbers | b 30 | 10 || 55 | ICC Data | LLLVAR b ..999 | O || 60 | Security Data | LLLTLV v ..999 | M || 63 | Transaction Advice | LLLTLV v ..999 | O || 64 | MAC | b 8 | 21 || 125 | Associated Account | LLLTLV v ..999 | O || 128 | MAC (alt) | b 8 | 21 |
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## 0200 - Financial Request (Payment/Sale)
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 2 | PAN | LLVAR n ..19 | 07 || 3 | Processing Code | n 6 | M || 4 | Transaction Amount | n 12 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M || 14 | Expiration Date | n 4 | 02 |
### Entry & Identification
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | M || 23 | Card Sequence Number | n 3 | O || 24 | Function Code | n 3 | M || 25 | POS Condition Code | n 2 | M || 35 | Track 2 Data | LLVAR Pz ..37 | 07 || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | M || 49 | Currency Code | n 3 | M || 52 | PIN Data | b 8 | 08 || 53 | DUKPT Key Numbers | b 30 | 10 || 55 | ICC Data | LLLVAR b ..999 | 05 || 60 | Security Data | LLLTLV v ..999 | M || 61 | Encrypted CHD | LLLTLV b ..999 | 07 || 62 | Cardholder Context | LLLTLV v ..999 | O || 64 | MAC | b 8 | 21 || 123 | Non-Payment PIN | LLLTLV v ..999 | 08 || 124 | Second Card Data | LLLTLV v ..999 | 22 || 128 | MAC (alt) | b 8 | 21 |
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## 0210 - Financial Response
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 3 | Processing Code | n 6 | M || 4 | Transaction Amount | n 12 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M |
### Entry & Response
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | M || 23 | Card Sequence Number | n 3 | 16 || 24 | Function Code | n 3 | M || 25 | POS Condition Code | n 2 | M || 37 | Retrieval Ref Number | an 12 | 15 || 38 | Authorisation Code | anp 6 | O || 39 | Response Code | an 2 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | 15 || 49 | Currency Code | n 3 | M || 53 | DUKPT Key Numbers | b 30 | 10 || 55 | ICC Data | LLLVAR b ..999 | O || 60 | Security Data | LLLTLV v ..999 | M || 63 | Transaction Advice | LLLTLV v ..999 | O || 64 | MAC | b 8 | 21 || 125 | Associated Account | LLLTLV v ..999 | O || 128 | MAC (alt) | b 8 | 21 |

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## 0220/0221 - Financial Advice (Capture)
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 2 | PAN | LLVAR n ..19 | 07 || 3 | Processing Code | n 6 | M || 4 | Transaction Amount | n 12 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M || 14 | Expiration Date | n 4 | 02 |
### Entry & Identification
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | M || 23 | Card Sequence Number | n 3 | O || 24 | Function Code | n 3 | M || 25 | POS Condition Code | n 2 | M || 35 | Track 2 Data | LLVAR Pz ..37 | 07 || 37 | Retrieval Ref Number | an 12 | 17 || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | M || 49 | Currency Code | n 3 | M || 53 | DUKPT Key Numbers | b 30 | 10 || 55 | ICC Data | LLLVAR b ..999 | 05 || 60 | Security Data | LLLTLV v ..999 | M || 61 | Encrypted CHD | LLLTLV b ..999 | 07 || 62 | Cardholder Context | LLLTLV v ..999 | O || 63 | Transaction Advice | LLLTLV v ..999 | O || 64 | MAC | b 8 | 21 || 124 | Second Card Data | LLLTLV v ..999 | 22 || 128 | MAC (alt) | b 8 | 21 |
---
## 0230 - Financial Advice Response
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 3 | Processing Code | n 6 | M || 4 | Transaction Amount | n 12 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M |
### Entry & Response
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | M || 24 | Function Code | n 3 | M || 25 | POS Condition Code | n 2 | M || 38 | Authorisation Code | anp 6 | O || 39 | Response Code | an 2 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | 15 || 49 | Currency Code | n 3 | M || 53 | DUKPT Key Numbers | b 30 | 10 || 60 | Security Data | LLLTLV v ..999 | M || 63 | Transaction Advice | LLLTLV v ..999 | O || 64 | MAC | b 8 | 21 || 125 | Associated Account | LLLTLV v ..999 | O || 128 | MAC (alt) | b 8 | 21 |
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## 0420/0421 - Reversal Advice
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 2 | PAN | LLVAR n ..19 | 03 || 3 | Processing Code | n 6 | 03 || 4 | Transaction Amount | n 12 | 03 || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | 03 || 13 | Local Date | n 4 | 03 || 14 | Expiration Date | n 4 | 03 |
### Entry & Identification
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | 03 || 23 | Card Sequence Number | n 3 | 03 || 24 | Function Code | n 3 | M || 25 | POS Condition Code | n 2 | 03 || 35 | Track 2 Data | LLVAR Pz ..37 | 03 || 37 | Retrieval Ref Number | an 12 | 17 || 38 | Authorisation Code | anp 6 | 03 || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | M || 49 | Currency Code | n 3 | 03 || 53 | DUKPT Key Numbers | b 30 | 10 || 55 | ICC Data | LLLVAR b ..999 | 05 || 60 | Security Data | LLLTLV v ..999 | M || 61 | Encrypted CHD | LLLTLV b ..999 | 03 || 63 | Transaction Advice | LLLTLV v ..999 | O || 90 | Original Data Elements | n 42 | M || 124 | Second Card Data | LLLTLV v ..999 | 03 || 128 | MAC | b 8 | 10 |

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## 0430 - Reversal Response
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 3 | Processing Code | n 6 | M || 4 | Transaction Amount | n 12 | 03 || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M || 24 | Function Code | n 3 | M || 25 | POS Condition Code | n 2 | M || 39 | Response Code | an 2 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M || 49 | Currency Code | n 3 | 03 || 53 | DUKPT Key Numbers | b 30 | 10 || 60 | Security Data | LLLTLV v ..999 | M || 63 | Transaction Advice | LLLTLV v ..999 | O |
---
## 0520/0521 - Reconciliation (Settlement)
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M || 24 | Function Code | n 3 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M || 50 | Currency Code, Recon | n 3 | M |
### Totals
| Field | Name | Format | Cond ||-------|------|--------|------|| 74 | Credits, Number | n 10 | M || 75 | Credits, Rev Number | n 10 | M || 76 | Debits, Number | n 10 | M || 77 | Debits, Rev Number | n 10 | M || 80 | Inquiries, Number | n 10 | M || 81 | Auths, Number | n 10 | M || 86 | Credits, Amount | n 16 | M || 87 | Credits, Rev Amount | n 16 | M || 88 | Debits, Amount | n 16 | M || 89 | Debits, Rev Amount | n 16 | M || 97 | Net Settlement | x+n 16 | M |
### Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 53 | DUKPT Key Numbers | b 30 | 10 || 60 | Security Data | LLLTLV v ..999 | M || 128 | MAC | b 8 | 10 |
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## 0530 - Reconciliation Response
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M || 24 | Function Code | n 3 | M || 39 | Response Code | an 2 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M || 50 | Currency Code, Recon | n 3 | M || 66 | Settlement Code | n 1 | M |
### Totals (if not in balance)
| Field | Name | Format | Cond ||-------|------|--------|------|| 74 | Credits, Number | n 10 | 13 || 75 | Credits, Rev Number | n 10 | 13 || 76 | Debits, Number | n 10 | 13 || 77 | Debits, Rev Number | n 10 | 13 || 80 | Inquiries, Number | n 10 | 13 || 81 | Auths, Number | n 10 | 13 || 86 | Credits, Amount | n 16 | 13 || 87 | Credits, Rev Amount | n 16 | 13 || 88 | Debits, Amount | n 16 | 13 || 89 | Debits, Rev Amount | n 16 | 13 || 97 | Net Settlement | x+n 16 | 13 |
### Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 53 | DUKPT Key Numbers | b 30 | 10 || 60 | Security Data | LLLTLV v ..999 | M || 128 | MAC | b 8 | 10 |
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## 0800 - Network Management (Log On/Echo)
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 24 | Function Code | n 3 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M || 53 | DUKPT Key Numbers | b 30 | 10 || 60 | Security Data | LLLTLV v ..999 | M || 70 | Network Mgmt Info | n 3 | M || 128 | MAC | b 8 | 10 |
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## 0810 - Network Management Response
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 24 | Function Code | n 3 | M || 39 | Response Code | an 2 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M || 53 | DUKPT Key Numbers | b 30 | 10 || 60 | Security Data | LLLTLV v ..999 | M || 63 | Transaction Advice | LLLTLV v ..999 | O || 70 | Network Mgmt Info | n 3 | M || 128 | MAC | b 8 | 10 |
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## 0300 - File Update (PIN Change)
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 2 | PAN | LLVAR n ..19 | 07 || 3 | Processing Code | n 6 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M || 14 | Expiration Date | n 4 | 02 |
### Entry & Identification
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | M || 23 | Card Sequence Number | n 3 | O || 24 | Function Code | n 3 | M || 35 | Track 2 Data | LLVAR Pz ..37 | 07 || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | M || 53 | DUKPT Key Numbers | b 30 | 10 || 60 | Security Data | LLLTLV v ..999 | M || 61 | Encrypted CHD | LLLTLV b ..999 | 07 || 123 | Non-Payment PIN | LLLTLV v ..999 | M || 128 | MAC | b 8 | 10 |
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## 0310 - File Update Response (PIN Change)
### Core Fields
| Field | Name | Format | Cond ||-------|------|--------|------|| 0 | MTI | n 4 | M || 1 | Bitmap | b 16 | M || 3 | Processing Code | n 6 | M || 7 | Transmission Date Time | n 10 | M || 11 | STAN | n 6 | M || 12 | Local Time | n 6 | M || 13 | Local Date | n 4 | M |
### Entry & Response
| Field | Name | Format | Cond ||-------|------|--------|------|| 22 | POS Entry Mode | n 3 | M || 23 | Card Sequence Number | n 3 | 16 || 24 | Function Code | n 3 | M || 37 | Retrieval Ref Number | an 12 | 15 || 38 | Authorisation Code | anp 6 | O || 39 | Response Code | an 2 | M || 41 | Terminal ID | ans 8 | M || 42 | Merchant ID | ans 15 | M |
### Context & Security
| Field | Name | Format | Cond ||-------|------|--------|------|| 48 | Transaction Context | LLLTLV v ..999 | 15 || 53 | DUKPT Key Numbers | b 30 | 10 || 60 | Security Data | LLLTLV v ..999 | M || 63 | Transaction Advice | LLLTLV v ..999 | O |

Message Field Fallback Response Values

The above Message Fields table identifies the fields that apply for each supported Message Type, and the conditions under which they apply. In many cases, a field will be identified as mandatory for a given response Message Type, and the value to be provided in that response is dependent upon the (also mandatory) value supplied in the original Request or Advice message that preceded it.

Should a Request or Advice message be sent that omits a mandatory field, the corresponding response message Response Code will contain a value indicating the request message was not valid. In such cases, any mandatory fields in the response message that depend upon absent request data will be populated with fallback values to ensure the response message remains compliant with the above specification.

The following table lists the fallback values that may be used in such cases.