| TRANSACTION_OK | 0 | The IVR transaction was completed successfully |
| TRANSIENT_ERROR | 1 | A transient gateway or system error has occurred - Try again later |
| INVALID_MSN | 2 | The mobile service number is invalid - Check and try again |
| INVALID_PAYMENT_DETAILS | 3 | Credit card, security or payment details are invalid - Check and try again |
| INSUFFICIENT_FUNDS | 4 | Credit card has insufficient funds to complete the transaction |
| VELOCITY_RULE_BREACH | 5 | Velocity rule breach, or too many invalid credit card rejections |
| DUPLICATE_TRACE_ID | 6 | Duplicate trace id submitted for request, use new trace id |
| OTHER_ERROR | 99 | An unspecified internal error has occurred |
