To improve convenience of a user by mitigating time and effort of setting work relating to address information on a source of transmission in a case where data whose address information on the source of transmission is unknown is received. The data transfer apparatus capable of communicating with a server providing a chat service manages a name representing a source of transmission of received data and address information on the source of transmission in association with each other based on instructions from a user. Then, the data transfer apparatus transfers the received data to an external device and provides the server with information for a user currently utilizing the chat service to grasp that the transfer has been performed.