Certificate
President
Stefan Osthaus
Issue date
The Customer Institute on the nomination of the Leadership Team and the
recommendation of the Board of Directors hereby certifies for
recommendation of the Board of Directors hereby certifies for
Validate Certificate:
Hüseyin Güneş Yusufoğlu
05/13/26 11:40AM
the status of Certified Assessor for the
Customer Institute Assessments
Customer Institute Assessments
ci-cert.org/A2409
Issued to
Hüseyin Güneş Yusufoğlu
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Credential Verification
Issue date: May 13, 2026
ID: ea2f2423-3d03-48d3-9ed2-f5d06b868ba2
Issued by
Customer Institute
The Customer Institute is a not-for-profit, global organization whose mission is to be the go-to source for B2B, B2C, and public-sector organizations to excel through customer centricity.