If these products are not your own products and you are not the manufacturer, then it seems like you either use one of these independent testing providers or you will be unable to sell them.
They are doing this because Chinese sellers used to forge the safety certificates and test reports. Now, you need to use one of the accredited providers.
When you get Food and Product Safety complaints in the EU, Amazon usually expects compliance documentation tied to the exact ASIN, and that’s why the “Submit” button is sending you to their compliance portal rather than letting you upload a generic explanation. In this case you’ll need to provide the specific safety certificates or test reports that match the product type, marketplace, and brand, and they must include the product identifiers that link directly to your listing.
A children’s toy safety certificate may not be accepted if the complaint is categorized under food or product safety, so you’ll want to double-check the classification of your ASIN in Seller Central and then upload the correct EU-required documents (such as EN 71 test reports for toys or EU food contact/material certificates if it’s kitchenware). If the certificate is valid but doesn’t show the exact model or ASIN, ask the brand to reissue a version that does, since Amazon compliance teams are strict about one-to-one matching.
Once you have the right document, go back into the Product Compliance Request dashboard and upload it there, and if the system still won’t accept it, open a case and ask the compliance team to review it manually.