What is the difference between a Quote, a purchase order number, and an Invoice and whom gets what, when, and in what order (Research Accounting)?
Usually a quote comes first (if needed), then the purchase requisition (PR), then the purchase order (PO), and then the invoice. The PR is created by the end user and once the necessary approvals are in place, Supply Chain Management changes it to a PO. An invoice is generated by the vendor and should be sent directly to Accounts Payable for payment.