This is a requirement of the Various Authorities Having Jurisdiction and Civil Defence Departments in order to obtain Product Approval. The idea is that there is no independent correlation between a test report and the product being offered or installed. In other words, you can’t tell that what you are buying is the same thing that was tested. Certification closes this loop. An accredited Certification Body (CB), also commonly referred as Conformity Assessment Body (CAB), verifies factory quality control, selects the sample to be tested, confirms the detailed description of the product, witnesses the testing, visits the manufacturer for periodic audits, issues a certificate, and ‘lists’ it on line. In the case of fire doors the CB also issues labels which are affixed to the door. Certifications should always be checked for validity in the issuer’s listings; ours can be found at www.tbwcert.com.