An image forming apparatus comprising: an operation accepting means configured to accept an operation of a user; a user authenticating means configured to authenticate the user who operates the operation accepting means ; a job executing means configured to execute a job having an activation condition in response to satisfaction of the activation condition; a job receiving means configured to receive the job; a state detecting means configured to, in the case where the job receiving means receives the job having the activation condition from an information processing apparatus, detect a state of the authenticated user; a user notifying means configured to, in response to reception of the job having the activation condition by the job receiving means with a plurality of users authenticated by the user authenticating means , transmit a plurality of pieces of user identification information for respectively identifying the plurality of users to the information processing apparatus; and a response accepting means configured to accept a response identifying a designated user among the plurality of users, from the information processing apparatus, wherein the state detecting means is configured to, in the case where the response of the designated user is accepted by the response accepting means, detect a predetermined state; the image forming apparatus further comprises an activation condition changing means configured to, in response to detection of the predetermined state by the state detecting means , change the activation condition; and the job executing means is configured to, after the predetermined state is detected by the state detecting means , execute the job having the activation condition in response to re-authentication of the user whose predetermined state has been detected by the user authenticating means . an operation accepting means configured to accept an operation of a user; a user authenticating means configured to authenticate the user who operates the operation accepting means ; a job executing means configured to execute a job having an activation condition in response to satisfaction of the activation condition; a job receiving means configured to receive the job; a state detecting means configured to, in the case where the job receiving means receives the job having the activation condition from an information processing apparatus, detect a state of the authenticated user; a user notifying means configured to, in response to reception of the job having the activation condition by the job receiving means with a plurality of users authenticated by the user authenticating means , transmit a plurality of pieces of user identification information for respectively identifying the plurality of users to the information processing apparatus; and a response accepting means configured to accept a response identifying a designated user among the plurality of users, from the information processing apparatus, wherein the state detecting means is configured to, in the case where the response of the designated user is accepted by the response accepting means, detect a predetermined state; the image forming apparatus further comprises an activation condition changing means configured to, in response to detection of the predetermined state by the state detecting means , change the activation condition; and the job executing means is configured to, after the predetermined state is detected by the state detecting means , execute the job having the activation condition in response to re-authentication of the user whose predetermined state has been detected by the user authenticating means . <EOS>