SAP ABAP Data Element SFAKN (Cancelled billing document number) is used by

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• Interface (1)
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#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Interface	IF_EX_ISH_CM_WF_EVENTS	BAdI Interface IF_EX_ISH_CM_WF_EVENTS	NBAS	IS-H	IS-H