Invoicing terms
Purchase order (PO)
A buyer's document ordering goods/services at agreed quantities and prices, issued before the invoice.
A purchase order is a document the buyer sends to the seller to order goods or services at agreed quantities and prices. It comes before the invoice and creates a record of what was ordered.
The seller fulfils the PO and then invoices against its PO number. Matching the invoice to the purchase order (and delivery receipt) is called "PO matching" or three-way matching, and it is how larger buyers control spending.
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