RNE - Registro Nacional de Estrangeiros
RNE is the Brazil alien identification card for foreigners issued by Polícia Federal (Federal Police), and is also referred as CIE (Carteira de Identidade de Estrangeiro). All foreigners that have a permanent, temporary or asylum visas must apply for a RNE within 30 days of arrival in the country.
The RNE is one of the most important documents foreigners have in Brazil and will be requested very often - for example to open bank accounts. The document must also be presented to the immigration authorities when the foreigner enters of leaves the country.