Who does the source of supply (SOS) owe an item to when a due-in detail is established after being requisitioned?

The source of supply (SOS) owes an item to the requisitioning activity when a due-in detail is established after a requisition has been made. This is because the requisitioning activity is the entity that initiated the request for the item. It acts on behalf of the organization or unit that requires the material, thus making it the rightful recipient of the item once it arrives.

In the context of material management, the requisitioning activity serves as the formal authority that places orders for supplies needed to fulfill operational requirements. The SOS's role is to ensure that the requested items are delivered to the correct location as specified by the requisitioning activity, maintaining the chain of accountability and ensuring that the supply processes are followed correctly.