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.

in rio de janeiro, the  receita federal do brasil has offices in many districts including ipanema and barra da tijuca, as listed on this page.

In ipanema, the most convenient location for anyone staying in the beach-side neighborhoods of the szona sul, the receita federal is located on Rua Barão da Torre, 296, ipanema, near posto 9.