When a customer order merchandise from your firm, he needs to know whether his order has been received and when he can expect shipment. Consequently, most firms establish that an acknowledgement be sent as an act of courtesy which tells the buyer that his order has been received, is appreciated and being processed. besides, it also confirms the order by listing the merchandise which will be shipped. This permits the buyer to check the list and inform the seller if any conflict exists between what has been ordered and what will be shipped.