Code | Description | Comment | Version |
AL | Always. All MFA segments (whether denoting errors or not) must be returned via the application-level acknowledgment message | | added v2.2 |
ER | Error/Reject conditions only. Only MFA segments denoting errors must be returned via the application-level acknowledgment for this message | | added v2.2 |
NE | Never. No application-level response needed | | added v2.2 |
SU | Success. Only MFA segments denoting success must be returned via the application-level acknowledgment for this message | | added v2.2 |