Environmental certification and ecolabels represents controversial topics in tourism. Hotels and tour operators use them in marketing, land management agencies in allocating operating permits, government agencies in promoting national interests, and ecotourism associations for education, lobbying, and revenue generation. Ecolabels have recently attracted the attention of multilateral tourism and multilateral environmental organizations alike. There are more then 150 tourism certification programmes all over the world, some of them at national or regional level, and some at international level, recognized by the most important tourism organizations. It is important to know that such an accreditation is ensuring tourists,that the tourism products and servicies they are buying are of good quality, professional and according to the sustainable development policies and principles.