Accurately characterising paths is the foundation of both resource sharing and routing in packet networks. Re-feedback is a simple realignment of metrics so that data headers characterise their downstream, rather than upstream path. Then the choice between network and end-point control can be made at run-time rather than prejudged as part of the network architecture. Re-feedback is designed to simplify solutions to mechanisms built over it, such as congestion control & policing, routing and protection against flooding attacks. Incentives are arranged to ensure honesty and responsibility will be the dominant selfish strategies, even for the first packet of a flow. Although economics is used to judge fairness, re-feedback allows us to manipulate incentives without impacting pricing to the end user.