Proforma invoices basically contain much of the same information as the formal quotation, and in many cases can be used in place of one. It should give the buyer as much information about the order as possible so arrangements can be made efficiently. The invoices inform the buyer and the appropriate import government authorities details of the future shipment; changes should not be made without the buyer's consent.
When a buyer asks for a quotation the seller should always provide a pro_forma invoice. A pro_forma invoice is an invoice sent in advance of the commercial invoice, which is the final bill that the buyer agrees to pay. Some of the advantages of pro_forma invoice to the importer include to show to his government for foreign currency allocation, opening letters of credit and most importantly, to have a detailed information on the transaction that can help him plan. An accurate and professionally submitted pro forma_invoice can help buyers to make a decision and agree to the quotation.