Abstract: Systems and method are provided for delivering notifications to user regarding use of their authentication information. The delivery of notifications involves ascertaining a device identifier associated with a request received from a user device to engage in a transaction using the authentication information and comparing this device identifier associated with the request to a plurality of known device identifiers previously associated with the authentication information. Thereafter, a notification for a user associated with the authentication information can be generated and delivered, if the device identifier is not among the plurality of known device identifiers. In the systems and methods, contact information for delivering the notification is based on contact information for at least one previous transaction that meets a selection criteria and that is associated with the authentication information.

Abstract: System and methods for delivering personalized offers are provided. In particular, based on an identification of a user from a plurality of users associated with a portal, items and inducements for an offer can be generated and delivered to the user. This involves identifying other user associated with the item and the portal and projecting a degree of interest for the user in the item based on similarity data between the plurality of users. The similarity data can be utilized and generated using a collaborative filter engine. Once items and corresponding inducements are identified, a communication can be provided for the user that facilitates access to information regarding the item and the associated inducement.

Abstract: Systems and method are provided for delivering notifications to user regarding use of their authentication information. The delivery of notifications involves ascertaining a device identifier associated with a request received from a user device to engage in a transaction using the authentication information and comparing this device identifier associated with the request to a plurality of known device identifiers previously associated with the authentication information. Thereafter, a notification for a user associated with the authentication information can be generated and delivered, if the device identifier is not among the plurality of known device identifiers. In the systems and methods, contact information for delivering the notification is based on contact information for at least one previous transaction that meets a selection criteria and that is associated with the authentication information.