Achieving EU and UN sustainability targets requires reducing the environmental impact of e-commerce deliveries—an area where consumer choice plays a pivotal role. This chapter presents a framework to help retailers design and evaluate communication strategies aimed at encouraging more sustainable delivery choices. The framework comprises a model and a set of assessment indicators. Grounded in communication, behavioural, and decision-making theories and informed by consumer interviews, the model identifies three pathways by which retailer communications can influence consumer delivery choices: by shaping intentions, by influencing habits, and by highlighting trade-offs. The model is accompanied by a set of indicators from which retailers can select to assess the intervention, its behavioural mechanisms, and impact on the consumer. An illustrative case study demonstrates how the framework can be applied to promote pick-up point deliveries over home delivery. Retailers should consider including the framework as part of their strategy for consumer influence and value creation.