From Longman Dictionary of Contemporary Englishpro forma invoicepro ˌforma ˈinvoice noun [countable] British English BBTa document like a bill that is sent to the customer to show what a price would be if he or she made an order SYN quotationFrom Longman Business Dictionarypro-forma invoicepro-ˌforma ˈinvoice1ACCOUNTING an invoice sent to a customer asking for payment before goods are sent, often done when the buyer is a new customerThe supplier may issue a payment request note or a pro forma invoice.2COMMERCE an invoice sent to a possible buyer as an example of prices etc of different goodsDealer inquiries welcome - discount rates and pro forma invoices on request. → invoice
