Due to Country of Origin (COO) regulations, when trading into the EU post Brexit, a Certificate of Origin is required for products that are manufactured in the United Kingdom.
This certificate is necessary in case EU tax authorities ask the shippers for supporting documentation. A template of the certificate can be found here (Template COO UK). If all of your products are manufactured in the United Kingdom, you may declare this in the certificate, and we will set all your products accordingly (Template All Products UK COO).
Please send it to Pro Support at prosupport@global-e.com.