Tracking and management data for a solicitation and response lifecycle is disclosed. The system generates and links tracking data for both the solicitation and the response, generates indicators that include the tracking data, and encodes the indicators so that the indicators are detectable as they traverse various events and locations throughout the lifecycle. A detailed audit trail of each event in the correspondence and response lifecycle is constructed using data matching methods and various statistics regarding the lifecycle, such that the response habits of customers are formulated.