About UCSL
United Certification Systems Limited (UCSL) is a GSTC-Accredited Certification Body headquartered in Cyprus, providing internationally acknowledged sustainability certification services for hotels and tour operators worldwide. With a team of experienced auditors and regional representatives across multiple continents, UCSL ensures rigorous, impartial, and credible evaluation of sustainability practices against the Global Sustainable Tourism Council Industry Standards – the world’s leading standard for sustainable travel and tourism.

Driven by a deep passion for sustainability, UCSL goes beyond auditing by actively contributing to capacity-building, awareness, and collaboration across the industry, supporting businesses in embedding sustainability as a driver of competitiveness, resilience, and long-term positive impact on people and the planet.

About GSTC Certification
GSTC Certification is the globally acknowledged mark of sustainable tourism, awarded to hotels, tour operators, and other businesses that meet the GSTC Standards – the world’s leading criteria for responsible travel. It confirms that a business has undergone a rigorous and impartial assessment by a certification body accredited by the Global Sustainable Tourism Council (GSTC), an international non-profit organization established through a strategic coalition including the United Nations Foundation, UN Environment Programme (UNEP), and UN Tourism.

Holding GSTC Certification demonstrates a business’s genuine commitment to sustainability through a process that is credible, transparent, and globally consistent. The term "GSTC Certification" specifically means certified by a Certification Body that is GSTC-Accredited, ensuring full alignment with the world’s highest standards for sustainable tourism.