The Grigiskes Company is the first Lithuanian paper manufacturer to be certified with a quality management system certificate EN ISO 9001 (1999 m).

In April 2011, the TUV CERT subdivision of TUV CERT certification institution performed the certification audit and confirmed that the quality management system meets standard requirements of „Quality management System Requirements” LST EN ISO 9001:2008 in the company. Acquired certificate testifies that the quality management system has been developed, documented, implemented, and maintained in the company. The certificate is valid until 2014 May 29. According to the LST EN ISO 14001:2005 requirements, the environment requirements are integrated in the quality management system procedures.