provided by the receita federal, this link allows checking the status of a cpf.

when no longer necessary, it is also possible to cancel a cpf by following the instructions provided on this link.

after obtaining a cpf, the cnpj can be obtained online, via the program called Programa Gerador em Disquete do CNPJ, and the program ReceitaNet, both available for free via the Receita Federal, the institution in charge of revenues and tax collection.