Mandatory
This field contains the collection number of the Receiver of the message.
In cases where the initial message was not sent via SWIFT, and the reference cannot be contained in field 21, the code SEE72 may be used and the reference placed in field 72.
This field must not start or end with a slash ('/') and must not contain two consecutive slashes ('//').
If the MT 422 is sent to advise of the fate of a previously received MT 405 Clean Collection, then:
field 21 of the MT 422 should contain the transaction reference of this MT 405, ie, field 21A of sequence B, and;
field 72 of the MT 422 should contain the Sender's reference of this MT 405, ie, field 20 of sequence A.