A cardholder/merchant friendly version of Command + CashAmount that describes the transaction being performed e.g. Sale, Refund, Authorisaction, Sale with Cashback etc.
| Command | In | Out |
| Authorisation | O | |
| Debit | O | |
| Credit | O | |
| AuthorisationReversal | ||
| Void | ||
| GetData | ||
| Cancel | ||
| GetHMAC | ||
| GetSystemInfo |