DropShip Return Order

Hi,

Any one please share setup document for Dropship order return order.

Our process is, customer order created and booked in "A" operating unit and ship confirmed from "B" operating unit. Custtomer will pay to "A" Operating unit. "A" Operating unit will pay for "B" operating unit.

in the above process, if customer returns any material how to capture it in system.

Thanks,

Jay