Greenethiquette is aimed at service providers as well as users of digital services, especially where services are operated by a third party: cloud computing, Software as a Service, hosted web sites, hosted applications, outsourced information systems, etc.. The Greenethiquette charter requires service providers to take account of their environmental responsibilities and commits them to implementing and developing eco-friendly methods in IT services. Any business or organisation which deals with hosted services can subscribe to the Greenethiquette charter at no cost by simply completing the electronic contract on the Greenethiquette website. The contract outlines criteria for hosted service providers, based on existing guidelines, such as the European Code of Conduct for data-centre efficiency and the Climate Savers computing initiative. Greenethiquette commits service providers to report on their eco-efficiency in hosted applications.