Quote Originally Posted by yesaul View Post
Customer Details :: Company ('ACCOUNT_COMPANY' key) is set to false

(I do put corporate customers having EU-VAT-# manually from Admin )

I use my own template (but this does no matter here, I think)
OK, that would be why the vat_number isn't getting posted, since the customer's Company field needs to be displayed on the storefront for the VAT number to be included.