The Banking Regulation Act of 1949 defines banking as accepting deposits from the public that are repayable on demand for the purpose of lending or investment. The Reserve Bank of India Act of 1934 and the Banking Regulation Act of 1949 govern banking operations in India. A formal letter of introduction is required when opening a new bank account to verify the applicant's identity and banking history. The letter should be printed on bank letterhead and signed by an authorized bank officer.