Self-evaluation done?

Then nothing stands in the way of the GreenSign Audit.

After the certification process has been completed with a self-evaluation on the part of the company, an audit by qualified GreenSign Institute employees or external auditing partners takes place to ensure the highest possible quality assurance. The auditor’s visit to your company is followed by an audit report with the evaluation and confirmation of the GreenSign level as well as recommendations for the further development of the company’s sustainability activities.

GreenSign auditors

Armin mit Max und Marion

Armin, Marion and Max

Our external auditors.

Auditor von GreenSign Frank Hörl

Frank Hörl


Frank Hörl started implementing the topic of sustainability in the hotel industry more than 20 years ago, first for an international group and later for a Swiss hotel company as an ambassador. In 2016, he was awarded the “Sustainable Leader Award” in Dubai for his activities.

Catrin Stoppa Auditorin GreenSign

Catrin Stoppa

“Integrating sustainability into corporate strategy is a holistic and continuous process in which every step counts.”

For more than 20 years, Catrin Stoppa has been passionately involved with wellness hotels, spas & thermal baths. In the course of her spa consulting, she not only deals with profitability, customer needs and the latest trends, but also pays special attention to sustainable developments in the industry.

Christian von Rumohr

Christian von Rumohr

“For a successful company, the three pillars of sustainability: ecology, economy and social responsibility, are essential.”

Christian von Rumohr sees it as his task and that of the entire industry to place these three pillars in a balanced and equal relationship. As General Manager at The Liberty Hotel Bremerhaven, he can draw on extensive practical experience. In addition, he trained as a CSR and sustainability manager in 2021.


Our independent partner for international auditing.

Control Union Certifications Germany (CUCG) is an independent Berlin-based certification company that is part of the global Control Union Group, with approximately 100 offices in over 80 countries worldwide, and is accredited against ISO 17065 by DAKKS. CUCG has many years of experience in auditing (testing) and certifying many different sustainability standards, including EU organic, GSTC, FSSC 22,000, BRC, RSPO SCC, UTZ, GOTS or FSC. Offering solutions to implement sustainability criteria, traceability, due diligence systems, transparency and risk mitigation along global supply chains from origin to end consumer is one of CUCG’s core competencies.

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