Certification Process until October 2026
The Green Key certification process in five parts
This page will guide you through the certification process, which consists of five parts:
Submit the application documents
On-site certification audit
Certification decision
Ongoing conformity during the certification period
Renewal of certification
Watch a short video explaining the Green Key application/certification process by clicking the image below.
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The certification process begins when an establishment expresses interest in Green Key certification.
PROCESS
The establishment contacts Green Key Management to express interest.
Establishments located in countries with a Green Key National Operator should contact their Green Key National Operator, to join the programme.
Establishments located in countries without a Green Key National Operator should contact Green Key International.
Green Key Management reviews the eligibility of the establishment.
Eligible establishments receive:
information about the criteria and certification process
the application form
a list of required supporting documents
APPLICATION REQUIREMENTS
The establishment must:
Complete the application form
Submit the required supporting documents
Sign and return the certification agreement
Pay the participation fee
Green Key Management will then review the application to ensure that all required documentation has been submitted and confirm the scope of certification.
Note: Some countries have fixed application deadlines, while others accept applications throughout the year. Please contact your Green Key Management for more information.
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Once the application has been reviewed, an auditor is assigned to conduct the certification audit.
SCHEDULING THE AUDIT
The auditor will contact the establishment to schedule the on-site audit.
Before the audit, the auditor receives all application documents from Green Key Management.
AUDIT PROCESS
The on-site certification audit typically includes:
Opening meeting
Document verification (may also be conducted in advance)
Visual inspection of the establishment
Audit summary and closing discussion
After the audit, the auditor prepares an audit report describing the findings.
AUDIT FREQUENCY
On-site audits are conducted at minimum:
Year 1 (before the first certificate is issued)
Year 2
Every three years thereafter
In years without an on-site audit, off-site audits are conducted through document review.
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The audit report is reviewed by an independent third-party entity (either an external auditor or a National Jury) to determine whether the establishment fully conforms with the required criteria.
POSSIBLE OUTCOMES
A - Full conformity
The independent third-party entity proceeds to certification decision.
B - 1–5 non-conformities
The establishment must submit additional evidence addressing the non-conformities.
Documentation must be submitted within two months.
The independent third-party entity reviews the additional evidence and proceeds to certification decision.
C - More than 5 non-conformities
The establishment must submit additional evidence and undergo a follow-up on-site audit.
Documentation must be submitted within two months.
The follow-up audit is scheduled after Green Key confirms that compliance has been achieved.
The establishment must cover additional audit and travel costs.
The independent third-party entity reviews the additional evidence and proceeds to certification decision.
The independent third-party entity thereafter makes the final certification decision, and Green Key Management informs the establishment.
If certification is granted, Green Key Management issues a certificate valid for one year.
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During the certification period, establishments must continuously conform with Green Key requirements.
If an establishment cannot maintain conformity, it must immediately inform Green Key so the certification can be temporarily suspended.
Handling complaints
If complaints are received during the certification period:
The establishment must respond to enquiries from the Green Key management.
If complaints are confirmed, the establishment must correct the non-conformities.
The certification may remain suspended until conformity is restored.
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Approximately 3-4 months before the certificate expires, the Green Key management contacts the certified establishment to encourage renewal.
To renew certification, the establishment must again complete:
Step 1: Application
Step 2: Audit
Step 3: Certification decision
For renewal, establishments must demonstrate increased conformity with Green Key criteria, as outlined on the criteria page.
Duration of the certification process
The Green Key certification process typically takes 4–6 months.
The exact timeline depends on factors such as:
The establishment’s readiness to meet the criteria
Timely submission of complete documentation
Payment of participation fees
Processing time by Green Key Management
Auditor availability for on-site or off-site audits
Time required for the final certification decision
Temporary certification measures - Middle-East region
In light of the current conflict and heightened security situation affecting the Middle East region, Green Key acknowledges that on-site audits in some Middle Eastern countries may face delays or logistical challenges.
Green Key–certified establishments in affected areas that are unable to complete their scheduled on-site audits within the required timeframe may apply for a discretionary extension of their current certification. Each request will be reviewed on a case-by-case basis, taking into consideration local conditions and operational constraints. Any extensions granted will be limited to a maximum period of one month at a time and may be subject to renewal upon reassessment.
We remain committed to supporting our partners during this challenging period while upholding the integrity of the Green Key certification programme.
Contact
Establishments located in countries with a Green Key National Operator should contact their Green Key National Operator, to join the programme.
Establishments located in countries without a Green Key National Operator should contact Green Key International.

