NBIS Certification Body (former known as LETRINA S.A.), has been active in the field of inspections since 1983. It is a Greek Body, accredited by the National Accreditation System (ESYD) and at the same time a member of the Hellenic Union Accredited Bodies (HELLASCERT).

It offers high-level certification services and addresses a wide range of businesses. Its services are distinguished for their reliability, recognition and in this way contribute to the improvement of the quality and safety of the products/services produced.