US Patent 9704161 Providing information without authentication

Techniques for providing information to a user without requiring the user to authenticate are described herein. In some instances, a user enters a payment identifier for the purpose of determining a fully-landed cost of one or more items. In response, a transaction processing service compares item details with information associated with the payment identifier and/or information about the owner of the identifier. The service may then provide this identifier-specific fully-landed cost to the user without requiring the user to authenticate or prove that she is the owner of the payment identifier.