Mandatory
This field contains the collection number of the collecting bank, eg, the content of field 20 of the MT 410 Acknowledgement.
In cases where the initial message is not sent via SWIFT and the reference cannot be contained in field 21, the code word 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 ('//') (Error code(s): T26).
If the reference of the collecting bank is not known, ie, no acknowledgement has been received, the code word NONREF must appear in this field. When this is the case, field 59 Drawee must be present.