If the method of self-declaration is not adopted, but the EU Notified Body (Notified Body abbreviated as NB) tests and issues a certificate, the company does not need to issue a "Self-Declaration Letter", and the "designated body" is responsible for product conformity and is subject to law protect. Therefore, there is no issue of determining the validity of the CE certificate issued by the EU Notified Body (Notified Body abbreviated as NB).
        However, for a third-party agency (intermediary or testing certification agency) to issue a CE certificate, it is necessary for the company or purchaser to determine the validity of the CE certificate, based on the accuracy and completeness of the data. In the final analysis, it is the third-party agency (intermediary or testing agency). The technical capabilities and credibility of certification bodies). Generally, a laboratory accredited by the European Laboratory Accreditation Agency or the Chinese Laboratory Accreditation Committee (CNAL) ISO/IEC17025 accredited laboratory is the most reliable, and even some customers have requirements.