We build machines with CE marking and now deliver to Russia. Now, however, we have problems with customs and I understood that you need to be certified as a supplement. Is that right?
The CE marking in Europe is not valid in Russia and you need to re-certify for Russia. Quality has nothing to do with it. Usually European certification is more demanding. Everything therefore must be re-certified for Russian standards, with reference to European standards is not valid.
Make sure that this certification is good, just selling without this certification can cause big problems.