The message may also be used to:
re-send a message (be it a confirmation, cancellation or reversal of a confirmation) sent by the account servicer to the account owner (the sub-function of the message is DUPL)
provide a third party with a copy of a message (be it a confirmation, cancellation or reversal of a confirmation) being sent by the account servicer for information (the sub-function of the message is COPY)
re-send a third party a copy of a message (be it a confirmation, cancellation or reversal of a confirmation) being sent by the account servicer for information (the sub-function of the message is CODU).
When the message is used as a cancellation, the linkage sequence must contain the reference of the original confirmation.