Unlike much of the previous research on this topic, which assesses the economic consequences of failed deliveries to the home, this study examines the issue of failed delivery from a carbon-auditing perspective. It considers the potential environmental savings from the use of alternative forms of collection and delivery over traditional delivery methods for failed home deliveries. With a spreadsheet carbon audit model, carbon dioxide (CO₂) emissions for a failed delivery are calculated on the basis of a typical van home delivery round of 120 drops and 50-mi (80-km) distance. Three first-time delivery failure rates (10%, 30%, and 50%) are assessed. The additional CO₂ from a second delivery attempt increases the emissions per drop by 9% to 75% (depending on the delivery failure rate). The vast majority (85% to 95%) of emissions emanating from a traditional failed delivery arise not from the repeat van delivery but from the personal travel associated with the customer's collecting a missed redelivery from the carrier's local depot. A range of collection–delivery points (CDPs) (supermarkets, post offices, railway stations) were all found to reduce the environmental impact of this personal travel. Post offices (currently operating a CDP system through the U.K. Royal Mail's Local Collect service) yielded the greatest savings, creating just 13% of the CO₂ produced by a traditional collection by car from a local depot. Overall, the research suggests that the use of CDPs offers a convenient and more environmentally friendly alternative to redelivery and customer collection from a local parcel depot.