The CNPJ, or Cadastro Nacional da Pessoa Jurídica, is a unique identification number assigned to businesses and organizations in Brazil. It serves as a tax identification number, similar to a Social Security number for individuals. The CNPJ is essential for companies to operate legally, open bank accounts, and fulfill tax obligations. To obtain a CNPJ, businesses must register with the Receita Federal, Brazil's federal revenue agency. The number consists of 14 digits and provides information about the company's legal structure, location, and tax status. Having a CNPJ is crucial for compliance with Brazilian laws and regulations.