TEL-STER has successfully
completed the certification
process and obtained confirmation
of its Business Continuity
Management System's
compliance with
the PN-EN ISO 22301:2020-04 standard.

We received the certificate
on December 19, 2025,
and it is valid
until December 18, 2028.

 We are very pleased with you inform that TEL-STER once again received a positive opinion with respect to ISO 9001, after a certification audit. 
We received the current ISO 9001 certificate on May 20, 2024 and is valid until May 19, 2027.

In order to keep our customers satisfied, in 2013 the company implemented the Information security - compliant with the PN-ISO/IEC 27001 standard.

In this way, joined the group of 200 Polish companies who hold the highest level of information management.
Current certificate is valid from 2024-08-05 to 2027-08-04.