Notified bodies are created as part of CE marking legislation. They are appointed by EU member states as competent organisations to provide definitive opinions and certifications relating to CE marking Directives and Regulations. The exact role of Notified Bodies and the extent of Notified Body involvement required is different for different Directives and Regulations.
CCQS is a Notified Body for Machinery Directive 2006/42/EC, Personal Protective Equipment Regulation(EU) 2016/425.
All Notified Bodies for all CE marking Directives are listed on the NANDO website maintained by the EU. The website lists the current appointed scopes of all Notified Bodies.
If you receive a certificate which claims to be from a Notified Body that you are not sure about, it is always worth checking their credentials on the NANDO site.