Abstract: A push delivery apparatus according to an exemplary aspect of the present invention includes a portion for sending information indicating which of contents kept in the delivery apparatus is to be received by a mobile terminal through a packet network to the mobile terminal in a first text message through a telephone network and for delivering a second text message which is a simplified version of the content to the mobile terminal through the telephone network if the mobile terminal does not acquire the content to be received by the mobile terminal within a predetermined period of time after sending the first text message.

Abstract: A fraudulent-purchase alarm system for issuing an alarm about a fraudulent purchase of an article for sale includes: a first storage that stores a price of the article for sale; a second storage that stores purchase amounts of articles for sale purchased by a user of the fraudulent-purchase alarm system; a third storage that stores an upper limit of a total purchase amount of the user; and a controller that, upon receiving a purchase request to purchase the article for sale and identification information about the user, refers to the first to third storages to issue an alarm about a fraudulent purchase if a sum of the purchase amounts of articles already purchased by the user identified by the identification information and the price of the article for sale indicated in the purchase request exceeds the upper limit, wherein the controller lowers the upper limit if a predetermined condition for preventing a fraudulent purchase is met.