the Polícia federal (federal police) is the body in charge of border control, and of emitting a variety of visa and naturalization related documents, and maintains a webpage accessible via this link.

the Ministério da Justiça (ministry of justice) is the organ in charge of many of the laws and procedures regulating most documents related to foreigners, visas, and naturalization processes, and maintains a website accessible via this link.

set up in the mid-twentieth century as a branch of the ministry of finance, the receita federal do brasil was an original venture, created to assume responsibility of all things related to federal taxes and custom controls.

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

the main function is tax and custom administration and income-tax collection, with the agency's purview stretching to regulation and investigation of illegal activities such as tax evasion, smuggling, and trafficking, amongst others.