A marketplace, a buyer or a broker sets its own document requirements, and those are theirs to state. CertSeven does not restate them, because they are not something this site can verify. What follows is what the federal rule requires of the certificate itself.
A marketplace rejected your certificate
What 16 CFR 1110.11(a) requires of the document, and the three places a certificate most often fails to meet the regulation: the product identifier, the rules named, and the testing body.
1110.11(a)(1) · 1110.11(a)(2) · 1110.11(a)(6) · 1110.13(a)
Your customs broker will not accept the certificate
Hosting a certificate does not satisfy the import duty. 16 CFR 1110.13(a)(1) requires the data elements to be eFiled into ACE at entry, and that is what the broker transmits.
1110.13(a)(1) · 1110.13(b) · 1110.9(c)
Your certificate is missing information
The seven content requirements of 16 CFR 1110.11(a), each with the shape the paragraph asks for and a construction that falls short of it.
1110.11(a)
Or go straight to the checker
Paste or photograph the certificate and see which of the seven content requirements of 16 CFR 1110.11(a) are present. Free, and the document never leaves your browser.
Check a certificate