How to Activate GTIN exemption
GTIN exemption allows you to export products to the amazon marketplace without requirements to provide a barcode (EAN or UPC code).
In order to achieve this, it's required to get approved from amazon to specific categories and brands.
A good overview of how products could be exported without GTIN code and all required steps could be found on the amazon marketplace help — https://sellercentral-europe.amazon.com/gp/help/G200426310
As soon as you get an exemption for your Brand to be export to amazon, you could activate this function inside Salestio — Amazon integration application.
GTIN exemption flag could be activated inside Amazon Profiles:
Please notice that GTIN Exemption works only together with an active option "Allow Product creation" and selected Creation Profile.