what are these?

Sales Order - Seller generated document that authorizes sale of the specified off-the-shelf item(s), issued after receipt of a customer's purchase order. It usually implies that there will be no additional labor or material cost incurred for the sale, except where it is used to initiate a production process.

• Goods already sold by the company were returned to the business by the customers sometimes later.

• Goods can be defective, not according to specification or damage.

• When goods are returned by customers, the company issue a credit note to the customer.

Advice Note - A note sent to a customer by a supplier of goods to advise him that an order has been fulfilled.

thanx milan 4 d reply....