In Brazil the foreign exchange rates fluctuate daily. With very few exceptions banks do not exchange currency.
Use the officially licensed exchange stores (they display a Autorizado pelo Banco Central sign). There are two exchange booths in each terminal of the International Airport just after Customs. Their rates, however, are rather high. But, there are several exchange stores in Copacabana, Ipanema, etc.. It is a good idea to check the rates in more than one.
The offered rates are not subject to commissions, taxes or fees in addition to the offered rate. Except in a few places such as some of the few banks that do currency exchange operations.
Beware of unauthorized persons offering better rates.( luggage carries, taxi drivers, etc..)
After hours, on weekends and holidays you may withdraw Brazilian Reais using your ATM card in any machine that displays one of the logos printed on the back side of your card.(Cirrus, Honor, Eurocard, ...)
Most hotels receptions will exchange currency. However their rates usually are the worst. Credit cards are accepted in most restaurants and stores.
When making payments in cash, the local Brazilian Reais are preferred by the majority of the merchants instead of foreign currency.
Enjoy your visit to the "Cidade Maravilhosa" [The marvelous city]!
This tip is provided by supplier M05740