PURCHASING ALERT METHODS AND APPARATUS

Systems and techniques for receiving transaction information at an authentication system. The transaction information may be processed using different rule sets, based on the financial instrument used for the transaction (for example, a particular credit card, debit card, bank account, brokerage account, and the like). One or more alerts may be generated and communicated to the user. The alerts may be formatted based on user device configuration information, such as a cell phone type, email type, and the like.