A PO can stay open long after everybody thinks the purchasing event is finished.
Partial Receipts Create Remaining Quantity
If only part of the order arrives, the balance can remain open for later receipt.
Backorders Can Preserve Demand
That is useful when the vendor really does owe more product. It is confusing when the remaining quantity is no longer expected.
Sage 100 2024 Added Better Visibility
Sage added a Received status for purchase orders received but not yet invoiced, and a quicker way to close partially received POs during Receipt of Goods Entry.
Old Open POs Need Context Before Closure
Before closing or correcting them, determine whether the remaining balance represents a real vendor commitment, a data issue, a duplicate, or a transaction nobody properly finished.