A method of, and system for, associating a plurality of transaction data records generated in a service access system including a plurality of service providers is provided. The transaction data records are generated in response to a user accessing the system during a single user session. The method includes generating a unique session identification that is uniquely associated with the single user session and which is receivable by the service providers. The unique session identification is included in the transaction data record. The plurality of transaction data records is received at a transaction processing facility from the service providers and processes using the unique session identification of each transaction data record. In certain embodiments, the unique session identification is provided in a user identification string of each transaction data record when the user session is authentication.