| Category | Code (Hex) | Description | 
| 
 | 0 | Success / Approved | 
| Processing | D0 | Generic Request Data Error | 
| Processing | D1 | Invalid Device (Unregistered MAC, Non-active MAC) | 
| Processing | D2 | Invalid Merchant (No MID/TID) or TID in used (Reversal in progress, etc) | 
| Processing | D6 | Zero Amount or less than Minimum Amount | 
| Processing | D8 | Exceed Max Amount | 
| 
 | F0 | Timeout | 
| 
 | F1 | Bank Host Timeout | 
| 
 | F2 | Delay Timeout | 
| Category | Code (Hex) | Description | 
| 
 | 0 | Success / Approved | 
| Bank ISO8583 | 1 | Refer to Card Issuer | 
| Bank ISO8583 | 2 | Refer to Issuer’s Special Conditions | 
| Bank ISO8583 | 3 | Invalid Merchant ID | 
| Bank ISO8583 | 4 | Pick Up Card | 
| Bank ISO8583 | 5 | Do Not Honor | 
| Bank ISO8583 | 6 | Error | 
| Bank ISO8583 | 7 | Pick Up Card, Special Conditions | 
| Bank ISO8583 | 8 | Honor with Identification | 
| Bank ISO8583 | 9 | Request in Progress | 
| Bank ISO8583 | 10 | Partial Amount Approved | 
| Bank ISO8583 | 11 | Approved VIP | 
| Bank ISO8583 | 12 | Invalid Transaction | 
| Bank ISO8583 | 13 | Invalid Amount | 
| Bank ISO8583 | 14 | Invalid Card Number | 
| Bank ISO8583 | 15 | No Such Issuer | 
| Bank ISO8583 | 16 | Approved, Update Track 3 | 
| Bank ISO8583 | 17 | Customer Cancellation | 
| Bank ISO8583 | 18 | Customer Dispute | 
| Bank ISO8583 | 19 | Re-enter Transaction | 
| Bank ISO8583 | 20 | Invalid Response | 
| Bank ISO8583 | 21 | No Action Taken | 
| Bank ISO8583 | 22 | Suspected Malfunction | 
| Bank ISO8583 | 23 | Unacceptable Transaction Fee | 
| Bank ISO8583 | 24 | File Update not Supported by Receiver | 
| Bank ISO8583 | 25 | Unable to Locate Record on File | 
| Bank ISO8583 | 26 | Duplicate File Update Record, old record replaced | 
| Bank ISO8583 | 27 | File Update Field Edit Error | 
| Bank ISO8583 | 28 | File Update File Locked Out | 
| Bank ISO8583 | 29 | File Update not Successful, contact acquirer | 
| Bank ISO8583 | 30 | Format Error | 
| Bank ISO8583 | 31 | Bank not Supported by Switch | 
| Bank ISO8583 | 32 | Completed Partially | 
| Bank ISO8583 | 33 | Expired Card - Pick Up | 
| Bank ISO8583 | 34 | Suspected Fraud - Pick Up | 
| Bank ISO8583 | 35 | Contact Acquirer - Pick Up | 
| Bank ISO8583 | 36 | Restricted Card - Pick Up | 
| Bank ISO8583 | 37 | Call Acquirer Security - Pick Up | 
| Bank ISO8583 | 38 | Allowable PIN Tries Exceeded | 
| Bank ISO8583 | 39 | No Credit Account | 
| Bank ISO8583 | 40 | Requested Function Not Supported | 
| Bank ISO8583 | 41 | Lost Card - Pick Up | 
| Bank ISO8583 | 42 | No Universal Amount | 
| Bank ISO8583 | 43 | Stolen Card - Pick Up | 
| Bank ISO8583 | 44 | No Investment Account | 
| Bank ISO8583 | 45 | Settlement Success | 
| Bank ISO8583 | 46 | Contactless Limit | 
| Bank ISO8583 | 47 | Cancel Success | 
| Bank ISO8583 | 48 | Cancel Fail | 
| Bank ISO8583 | 49 | No Transaction Reference Number | 
| Bank ISO8583 | 50 | Online PIN requested by the Issuer | 
| Bank ISO8583 | 51 | Not sufficient funds | 
| Bank ISO8583 | 52 | No Chequing Account | 
| Bank ISO8583 | 53 | No Savings Account | 
| Bank ISO8583 | 54 | Expired Card | 
| Bank ISO8583 | 55 | Incorrect PIN | 
| Bank ISO8583 | 56 | No Card Record | 
| Bank ISO8583 | 57 | Transaction Not Permitted to Cardholder | 
| Bank ISO8583 | 58 | Transaction not permitted to terminal | 
| Bank ISO8583 | 59 | Suspected Fraud | 
| Bank ISO8583 | 60 | Card Acceptor Contact Acquirer | 
| Bank ISO8583 | 61 | Exceeds Withdrawal Amount Limits | 
| Bank ISO8583 | 62 | Restricted Card | 
| Bank ISO8583 | 63 | Security Violation | 
| Bank ISO8583 | 64 | Original Amount Incorrect | 
| Bank ISO8583 | 65 | Exceeds Withdrawal Frequency Limit | 
| Bank ISO8583 | 66 | Call Acquirer Security Department | 
| Bank ISO8583 | 67 | Hard Capture - Pick Up Card at ATM | 
| Bank ISO8583 | 68 | Response Received Too Late | 
| Bank ISO8583 | 70 | Settlement amount cannot exceed authorized amount | 
| Bank ISO8583 | 71 | Inquiry Record Not Exist | 
| Bank ISO8583 | 75 | Allowable PIN Tries Exceeded | 
| Bank ISO8583 | 76 | Invalid Credit Card Format | 
| Bank ISO8583 | 77 | Invalid Expiry Date Format | 
| Bank ISO8583 | 78 | Invalid Three Digits Format | 
| Bank ISO8583 | 80 | User Cancellation by closing internet browser | 
| Bank ISO8583 | 81 | Unable to authenticate cardholder | 
| Bank ISO8583 | 86 | ATM Malfunction | 
| Bank ISO8583 | 87 | No Envelope Inserted | 
| Bank ISO8583 | 88 | Unable to Dispense | 
| Bank ISO8583 | 89 | Administration Error | 
| Bank ISO8583 | 90 | Cut-off in Progress | 
| Bank ISO8583 | 91 | Issuer or switch is inoperative | 
| Bank ISO8583 | 92 | Financial Institution not Found | 
| Bank ISO8583 | 93 | Transaction Cannot be Completed | 
| Bank ISO8583 | 94 | Duplicate Transmission | 
| Bank ISO8583 | 95 | Reconcile Error | 
| Bank ISO8583 | 96 | System malfunction | 
| Bank ISO8583 | 97 | Reconciliation Totals Reset | 
| Bank ISO8583 | 98 | MAC Error |