P · 2
Proforma invoice PI
A preliminary invoice issued by the seller before shipment, listing the product, quantity, unit price, Incoterm, payment terms, delivery time and bank details. Buyers use it to open a letter of credit, pay an advance or apply for import licences or foreign-exchange allocation. It is not a tax invoice; once countersigned by the buyer it can serve as the contract in simple deals, but larger transactions deserve a full sales contract.
Purchase order PO
The formal order a buyer sends to a supplier stating the product, specification, quantity, price, delivery date, delivery term and payment conditions. Once the seller confirms it in writing (order confirmation), a binding contract exists between the parties. The PO number is quoted on invoices, delivery notes and shipping documents and makes reconciliation easier.