According to one embodiment, a purchased article registration apparatus includes a declaration unit, an input unit, a determination unit, and a notification unit. The declaration unit accepts a declaration input indicating that a customer carries a reusable shopping bag with which the customer takes a purchased article home. The input unit accepts input of article identification data that can identify the article purchased by the customer. The determination unit determines whether the article specified by the article identification data having its input accepted by the input unit is an article to be separately packaged or not. The notification unit notifies that separate packaging should be provided, when the declaration that the customer carries the reusable shopping bag is accepted and it is determined that the article is an article to be separately packaged.