A Pro-forma invoice is an abridged or estimated invoice in advance of delivery of goods. It notes the kind and quantity of goods, their value, and other important information such as weight and transportation charges.
Pro-forma invoices are commonly used as preliminary invoices with a quotation, or for customs purposes in importation. They differ from a normal invoice in not being a demand or request for payment.
Go to SALES ‣ Configuration ‣ Settings and activate the Pro-Forma Invoice feature.