The buyer of our company will bring the purchasing order that is printed the name of our company to place the purchasing order to supplier to be as client, stating the product’s quality, packaging and delivery time and so on. A purchase order (PO) is a commercial document and first official offer issued by a buyer to a seller indicating types, quantities, and agreed prices for products or services. It is used to control the purchasing of products and services from external suppliers.[1] Purchase orders can be an essential part of enterprise resource planning system orders.