A delivery system including an information processing apparatus operated by a user, a printing apparatus and a server that instructs delivery of a consumable of the printing apparatus. The information processing apparatus requests screen information for making a contract related to the delivery of the consumable to the server, displays a screen based on the screen information received from the server, and transmit registration information input on the screen to the server. The server creates the screen information and transmits the screen information to the information processing apparatus, makes a contract of the delivery of the consumable to be used in the printing apparatus with the user, based on the registration information, and delivers the consumable to the user when a remaining amount of the consumable is less than a predetermined amount in the printing apparatus.