Abstract: Systems and methods are provided for verifying attributes of users in connection with network interactions involving the users. An example computer-implemented method includes receiving an authentication request (AReq) in connection with an interaction related to an age-restricted product, where the AReq includes an account number for a user and an age verification signal. The method also includes, in response to the age verification signal, retrieving a birthdate of the user, determining an age of the user based on the birthdate of the user, and determining the age of the user satisfies a defined threshold. The method then includes, in response to the age of the user satisfying the defined threshold, causing a challenge question to be issued to the user, whereby authentication of the user is initiated through a mobile device of the user.