Accredited means that a Certification Body (CB) has been verified through a rigorous external review from an accreditation body — our partner Assurance Services International (ASI) — whereby ASI provides assurance that the CB awards certification according to processes that comply with international standards and good practices. Businesses certified by an Accredited CB can use the GSTC logo along with the CB’s mark.

The Certification Bodies listed below have been Accredited for compliance with the requirements of the Manual for GSTC Accreditation.


GSTC-Accredited Certification Bodies for Hotels/Accommodations

Bureau Veritas

Bureau Veritas is a world leader in testing, inspection and certification services. Since its creation in 1828, Bureau Veritas has been supporting its clients on every continent to continually improve their performance via certification of management systems, product certifications and customized audits. The Group has more than 78,000 employees located in more than 1,500 offices and laboratories around the globe. Bureau Veritas helps its clients improve their performance by offering services and innovative solutions, in order to ensure that their assets, products, infrastructure and processes meet standards and regulations in terms of quality, health and safety, environmental protection and social responsibility. Get certified by Bureau Veritas

Control Union

control unionControl Union Certifications offers a global one-stop-shop for a wide range of certification programmes. We understand the importance of impartiality and objectivity, and how to professionally manage conflicts of interest. From the beginning, sustainability has been the main focus of our certification services. Control Union Certifications presents a wide range of programmes in agriculture, food, feed, forest products, textiles and bio energy. In 2016, Control Union Certifications became the first Accredited CAB for the GSTC Criteria for Hotels and Tour Operators, which provides the highest level in terms of credibility within the GSTC Integrity program. This means that Control Union Certifications can certify hotels and tour operators directly against the GSTC Criteria. Get certified by Control Union

United Certification Systems Limited

UCSL United Certification Systems Limited is an independent international certification body registered in Cyprus and operating in Eastern and Western Europe, Russia, Middle East, India and China. UCSL currently provides forest (FSC, PEFC), marine (ASC, MSC) and tourism (GSTC) certification services and develops its involvement in other spheres such as biofuel, water, metals and sustainable enterprise schemes. The team of certification body involves over 100 professionals with a vast experience in the sustainability sector. UCSL aims to contribute to the environmental well-being of the planet through provision of excellent services to like-minded sustainable businesses. Get certified by UCSL United Certification Systems Limited

Vireo Srl

Vireo Srl is a certification company whose commercial activities consist of providing Italian and foreign companies with environmental certification services. Vireo provides worldwide recognized environmental certification schemes such as FSC, MSC, and GSTC - as a GSTC-Accredited certification body. The professional approach and deep knowledge of standards are the key elements that mark Viero's services. Based in Padova, Italy, Vireo has international experience and works with professional and highly qualified auditors. Get certified by Vireo Srl



Certification for Tour Operators

Tour Operators and tourism land transport providers may gain certification to the GSTC Criteria by contacting one of the organizations here. These certification providers fall into two types: Certification Bodies that are accredited to certify, and Certification Schemes that provide pre-certification consulting and training and guide the client to an accredited Certification Body to complete the certification. As such, these certification programs and their certificate-holders are authorized to display the designated GSTC Logo (per the terms of formal licensing agreements with the GSTC.

Bureau Veritas