Better options include exchange offices (cambios) in shopping malls, such as one located on the third floor of a large mall at the beginning of Paulista Avenue, which operates even on Sundays. Travelex is a recognized chain with multiple locations, offering competitive rates (e.g., 4.9 BRL per 1 USD) but requires a passport. For immediate, minimal expenses like taxi or coffee upon arrival, exchanging a small amount (e.g., 100 USD) at the airport is acceptable.
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