The following line formats must be used:
Optional
This field specifies additional information for the Receiver.
This field may be used to provide additional information to the Receiver where no other field is available. In view of the possible delay of execution and/or rejection of the transaction(s), field 72 may only be used after bilateral agreement between the Sender and the Receiver and in encoded form.
The codes REJT/RETN may be used in this field. If either of these codes is used in the first position of the first line, placed between slashes ('/'), it is mandatory to follow the Generic Payment Reject Mechanism described in Standards Usage Guidelines.