The CPF, or Cadastro de Pessoas Físicas, is a Brazilian individual taxpayer identification number. It is issued by the Receita Federal, Brazil's federal revenue agency, and is essential for various financial activities, such as opening bank accounts, applying for loans, and filing taxes. The CPF helps the government track taxpayers and ensure compliance with tax laws. To obtain a CPF, individuals must provide personal information, including their name, date of birth, and address. The CPF is unique to each person and remains the same throughout their life, making it a crucial document for both residents and foreigners in Brazil.