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| Certificate | Country | Section | Plant |
| FSSC 22000 | Germany | Hygiene | STI Lauterbach Verpackung GmbH |
| DIN EN 15593:2008 | Germany | Hygiene | STI Corrugated GmbH |
| BRC / IOP | Hungary | Hygiene | STI Petöfi Nyomda Kft. |
| BRC / GS | Czech Republic | Hygiene | STI Česko s.r.o. |
| ISO 45001:2018 | UK | Occupational safety | STI Line Ltd. |
DIN EN ISO 50001:2018 | Germany | Energy | STI Gustav Stabernack GmbH |
| DIN EN ISO 50001:2018 | Germany | Energy | STI Lauterbach Verpackung GmbH |
| DIN EN ISO 50001:2018 | Germany | Energy | STI Corrugated GmbH |
| DIN EN ISO 50001:2018 | Germany | Energy | STI d+v Display + Verpackung GmbH & Co KG |
| DIN EN ISO 50001:2018 | Hungary | Energy | STI Petöfi Nyomda Kft. |
| ECMA GMP | Hungary | Hygiene | STI Petöfi Nyomda Kft. |
ISO 9001:2015 | UK | Quality | STI Line Ltd. |
| ISO 9001:2015 | Germany | Quality | STI Gustav Stabernack GmbH |
ISO 9001:2015 | Germany | Quality | STI Lauterbach Verpackung GmbH |
ISO 9001:2015 | Germany | Quality |
STI Corrugated GmbH |
| ISO 9001:2015 | Germany | Quality | STI d+v Display + Verpackung GmbH & Co.KG |
| Germany | Quality |
STI Schräder Verpackungen GmbH |
| Germany | Quality |
STI CAD Laser Form GmbH |
| Germany | Quality |
STI Pro Grafik GmbH |
ISO 9001:2015 | Czech Republic | Quality | STI Česko s.r.o. |
ISO 9001:2015 | Hungary | Quality | STI Petöfi Nyomda Kft. |
| ISO 14001:2015 | Hungary | Environment | STI Petöfi Nyomda Kft. |
| ISO 14001:2015 | Czech Republic | Environment | STI Česko s.r.o. |
| ISO 14001:2015 | Germany | Environment | STI Lauterbach Verpackung GmbH |
| ISO 14001:2015 | Germany | Environment | STI Corrugated GmbH |
| UK | Environment | STI Line Ltd. |
| FSC® - Forest Stewardship Council® | Germany | Environment | STI Gustav Stabernack GmbH |
| FSC® - Forest Stewardship Council® | Germany | Environment | STI Lauterbach Verpackung GmbH |
| FSC® - Forest Stewardship Council® | Germany | Environment | STI Corrugated GmbH |
| FSC® - Forest Stewardship Council® | Germany | Environment | STI d+v Display + Verpackung GmbH & Co.KG |
| FSC® - Forest Stewardship Council® | Germany | Environment | STI Schräder Verpackungen GmbH |
| FSC® - Forest Stewardship Council® | France | Environment | STI Display Emballage Création S.A.R.L. |
| FSC® - Forest Stewardship Council® | Czech Republic | Environment | STI Česko s.r.o. |
| FSC® - Forest Stewardship Council® | China | Environment | STI Asia Pacific Ltd. |
| FSC® - Forest Stewardship Council® | China | Environment | STI POS Solutions (Shenzhen) Co Ltd. |
| PEFC - Forest Management | Czech Republic | Environment | STI Česko s.r.o. |
| FSC® - Forest Stewardship Council® | Hungary | Environment | STI Petöfi Nyomda Kft. |
| PEFC - Forest Management | Hungary | Environment | STI Petöfi Nyomda Kft. |
| SID - Certificate of conformity | Germany | Quality | STI Pro Grafik GmbH |
| DIN EN 15593:2008 | Czech Republic | Hygiene | STI Česko s.r.o. |
