An image forming apparatus capable of receiving remote control support by an information processing apparatus via a relay server, the image forming apparatus comprising: instruction means for instructing to start the remote control support; transmission means for transmitting an authentication request to a management server in accordance with an instruction by said instruction means, wherein the authentication request comprises a unique identifier of the image forming apparatus; reception means for receiving a first authentication token and a URL of the relay server, that is transmitted from the management server in response to the authentication request; request means for requesting the relay server, using the received URL of the relay server, to verify the first authentication token and to return a first session ID for the remote control support if the first authentication token is verified, wherein the reception means is further configured to receive the first session ID from the relay server; the request means is further configured to request creation of a support URL to the relay server, wherein the request comprises the first session ID; the reception means is further configured to receive the support URL in response to the request for creation of the support URL; and the image forming apparatus further comprises communication means for, upon obtaining the support URL from the relay server in response to the request for creation of the support URL, joining a communication with the information processing apparatus via the relay server based on the support URL; and wherein the reception means is further configured to receive a serial number created by the relay server which is in a one-to-one relationship with the created support URL upon the joining the communication; and the image forming apparatus further comprises display means adapted to display the serial number upon receiving the serial number, wherein the serial number may comprise a character. instruction means for instructing to start the remote control support; transmission means for transmitting an authentication request to a management server in accordance with an instruction by said instruction means, wherein the authentication request comprises a unique identifier of the image forming apparatus; reception means for receiving a first authentication token and a URL of the relay server, that is transmitted from the management server in response to the authentication request; request means for requesting the relay server, using the received URL of the relay server, to verify the first authentication token and to return a first session ID for the remote control support if the first authentication token is verified, wherein the reception means is further configured to receive the first session ID from the relay server; the request means is further configured to request creation of a support URL to the relay server, wherein the request comprises the first session ID; the reception means is further configured to receive the support URL in response to the request for creation of the support URL; and the image forming apparatus further comprises communication means for, upon obtaining the support URL from the relay server in response to the request for creation of the support URL, joining a communication with the information processing apparatus via the relay server based on the support URL; and wherein the reception means is further configured to receive a serial number created by the relay server which is in a one-to-one relationship with the created support URL upon the joining the communication; and the image forming apparatus further comprises display means adapted to display the serial number upon receiving the serial number, wherein the serial number may comprise a character.