A product Proforma Invoice is a preliminary invoice issued by a seller to a buyer before the actual shipment of goods. It serves as a quotation or estimate of the cost of the products or services being purchased. A product proforma invoice typically includes details such as the description of the products or services, quantity, unit price, total price, shipping terms, payment terms, and any applicable taxes or duties. It is used by the buyer to confirm the order and initiate payment, and by the seller to provide a formal offer for the goods or services. Unlike a commercial invoice, a proforma invoice is not a legally binding document and does not require payment.