Report infringements. The core function of Wal-Mart is the infringement complaint submission system. Sellers can report and complain about four types of infringements. Wal-Mart's reporting mechanism is to report infringements. The reporting types are trademark infringement, counterfeiting, copyright infringement, and patent infringement. Wal-Mart Department Store Co., Ltd. is an American global chain enterprise. Wal-Mart is mainly involved in the retail industry. Wal-Mart mainly has four business modes: Wal-Mart shopping malls, Sam's Club stores, Wal-Mart stores, and Wal-Mart community stores.