First check whether the free sales certificate is issued by the company itself or by an industry association or government department. If it is an industry association or government department (for example: medical device products, go to the Food and Drug Administration (Go to apply for it), then it will be easy to apply for it. You can apply directly with the original, a copy, and a copy of the company's business license.
If the free sales certificate is issued by the company itself, it will be more troublesome. It will need to provide supporting materials such as production license, health certificate, and test report. If the company is a trader, the certificate must be issued by the factory. The sales contract, as well as the factory's production license, health certificate, test report and other supporting materials can be used for CCPIT certification. Of course, you can also go directly to a professional agency to handle it. If the customer still needs to apply for a signature from the embassy, ??they can just get the certificate and apply for consular authentication. First go to the Council for the Promotion of International Trade to get a certificate.