Use this activity to either unmatch self-billing invoice lines from an incoming self-billing invoice, or to unmatch and remove the lines from a customer self-billing invoice.
If you unmatch the line from the Incoming Self-Billing Invoice window, it will be removed from the relevant customer self-billing invoice. If you unmatch and remove the line from the Customer Self-Billing Invoice window, it will become unmatched in the incoming self-billing invoice.