16x |
Mandatory
This field contains a reference to the related transaction.
This field must not start or end with a slash '/' and must not contain two consecutive slashes '//' (Error code(s): T26).
If the previous message is an MT 202, 203 or 205, this field contains the field 21 Related Reference of that message.
If the previous message is an MT 200 or 201, this field contains the field 20 Transaction Reference Number of that message.