To ensure the final products can be sold legally, some kinds of certifications are mandatory, depends on the product category and official regulation.
Makerfabs can deal with this by cooperating with 3rd authorized certification labs, Makerfabs will deal with all the problems in the testing/ certification, and get a solution together with the designer/ labs, to make the products pass the certification.
As the certificates request different for different countries, please contact service@makerfabs.com or your personal project manager for detailed checks and quotes.