A Purchase Order (PO) is a formal document a buyer issues to a supplier authorizing a purchase and specifying quantity, price, delivery terms, and PO number for reconciliation. POs form the transactional layer of most B2B commercial relationships.
How POs link to contracts
POs typically reference an underlying contract (MSA, framework, or standing agreement). Ensuring the PO honors contracted pricing, terms, and rebate structures is where structured contract data plus ERP integration prevents pricing leakage.
The verification loop
Invoice matching against PO and contract terms is where pricing compliance gets enforced. Deviations flagged at this stage are cheap to resolve; deviations discovered later carry material recovery costs.