NFE-207
Rejeição: CNPJ do emitente inválido (…).
In English The issuer's CNPJ is zeros or has wrong check digits (alphanumeric CNPJs count letters as their code minus 48).
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
nfe:infNFe
not($emit/nfe:CNPJ) or br:cnpj($emit/nfe:CNPJ)
Checked with NF-e 4.00, NF-e 4.00 with authorisation protocol