MTN91: (2) Field 21: Related Reference
FORMAT
| 16x |
PRESENCE
Mandatory
DEFINITION
This field contains the reference of the transaction to which the charge(s), interest and/or other expense(s) in this message apply, for example, field 20 Transaction Reference Number of the related message.
NETWORK VALIDATED RULES
This field must not start or end with a slash '/' and must not contain two consecutive slashes '//'.
