The IIS Group has obtained a significant number of accreditations, authorisations and approvals by National and International Authorities.
Below, divided by the IIS Group company:

IIS >>
ACCREDIA: accreditation (no. 0029) for performing laboratory tests, in compliance with standard UNI CEI EN ISO/IEC 17025

IIS CERT >>
Certification Body of the IIS Group and owns  for the performance of its activities, accreditation by the ACCREDIA National Accreditation Body and  authorisations by the European Welding Federation (EWF), the International Institute of Welding (IlW), as well as by the National Railway Safety Agency (ANSF).
The relative documentation can be found on the page Main acknowledgements.

IIS PROGRESS >>
IIW/EWF ATB: Authorized Training Body
ESA/IPC:  Authorized  Training  School in micro-joining for aerospace and industrial applications (IIS PROGRESS)
IAS REGISTER: certification for the application of the quality system, in compliance with standard UNI EN ISO 9001

IIS SERVICE >>  
IAS REGISTER: certification for the application of the quality system, in compliance with standard UNI EN ISO 9001
ACCREDIA: accreditation as Type C Inspection Body in compliance with standard UNI CEI EN ISO/IEC 17020 Ed. 2012