Abstract: Identifying and notifying credit card issuing banks of an increased risk of credit card fraud. An early warning system assists credit card transaction processors and credit card issuing banks reduce occurrences of credit card fraud. By analyzing transaction data and credit card account information, an authorization decision is made and transmitted to the merchant. The authorization decision either approves or denies the credit card transaction. Conventional authorization systems employ a security code that can be transmitted with an authorization request to limit authorization to transactions including the proper security code. Because some issuing banks do not utilize the security code system, they are exposed to an increased risk of credit card fraud. The early warning system can be used to monitor the authorization decisions that are transmitted by the processor to the merchant.