Which of the following is sent by a supplier who does not want to sell on credit?

A proforma invoice is sent by a supplier before any sale on credit takes place. It looks like a normal invoice, listing the goods, prices, and total cost, but it is not a demand for payment on credit terms. Instead, it asks the buyer to pay in advance or on delivery, which is exactly what a supplier does when they are unwilling to extend credit to a customer.

The other documents serve different purposes. A consular invoice is a document certified by the consulate of the importing country, used mainly for customs and import-duty purposes in international trade. A quotation simply states the price at which a supplier is willing to sell, without necessarily addressing credit terms. An advice note tells the buyer that goods are on their way, listing what has been dispatched, and is normally used alongside an ordinary invoice, not as a substitute for one.

Examination reminder: the defining feature of a proforma invoice is that it demands payment before or on delivery, which is why it is the supplier's tool for avoiding credit sales.