ocr: Customer Billing. tis often the case that creditors fail to make payments vhen due for the simple reason that their suppliers nave either tailed to invoice them or have failed to nclude all the necessary details on the invoice that should bei included to tacilitate payment. Itis vital, theretore, that the credit control department ensures nvoices are sent as soon as goods are despatched and that all the necessary details are included on the invoice. These details willi include - intormation such as: Date of despatch Ac description of the goods supplied The customer's purchase order number.