Purchase Order is not simply a place to print something and send it to a vendor.
The PO Creates the Purchasing Commitment
It records what the business expects to buy, from whom, in what quantity, for which warehouse or purpose, and under which purchasing terms.
Receiving Changes the Story
Once goods arrive, the question becomes what was actually received versus what was ordered. Partial receipts, backorders, and receipt timing all affect whether the PO is really finished.
Inventory and AP Sit Downstream
Receipts can affect inventory quantity and cost, while vendor invoices eventually move into Accounts Payable.
That is why Purchase Order problems often become inventory or AP problems later.