In 2020, Brazil introduced a new regulation stipulating the inclusion of the Taxpayer Identification Number (CPF or CNPJ) on shipments of goods and services entering the country. This enforcement has recently become more rigorous, resulting in delayed orders. To adhere to this requirement, it is important to input the Brazilian tax ID number in the "Company/Organization Field" on the shipping label. Packages that do not contain the proper identification of the CPF are subject to return to the country of origin.

Further details for shipping to Brazil can be found here by Correios.