Abstract: An authentication system, comprising at least one processor configured to: execute first authentication for a first user when the first user is present at or arrives at a first place; determine whether a second user who has a possibility of being authenticated as the first user by the first authentication is present at the first place, or whether the second user has arrived at the first place; and execute, when it is determined that the second user is not present at or has not arrived at the first place, first processing for the first user based on the first authentication.

Abstract: An information processing system includes an identification information receiving unit for receiving user identification information presented by a user, a determining unit for determining whether the user identification information that has been received is first user identification information for performing first processing relating to the user, or second user identification information for performing second processing that is executed following the first processing, and an user identifying unit for, in a case of determining that the user identification information that has been received is the second user identification information, identifying a user that is an object of third processing relating to the user, with the third processing being executed following the second processing, on the basis of the second user identification information.

Abstract: Provided is an electronic payment system which receives a payment request for electronic payment when a user visits a predetermined place to use a series of services, the electronic payment system including at least one processor configured to: determine, depending on the user, which one of real-time payment to be executed for each payment request or lump-sum payment to be collectively executed for a plurality of payment requests is to be executed; and execute one of the real-time payment or the lump-sum payment based on a result of the determination.

Abstract: An information processing system includes an identification information receiving unit for receiving user identification information presented by a user, a determining unit for determining whether the user identification information that has been received is first user identification information for performing first processing relating to the user, or second user identification information for performing second processing that is executed following the first processing, and an user identifying unit for, in a case of determining that the user identification information that has been received is the second user identification information, identifying a user that is an object of third processing relating to the user, with the third processing being executed following the second processing, on the basis of the second user identification information.