Penalty under Section 271FAA for furnishing inaccurate reportable-account information; due diligence failures and non-disclosure trigger liability. Penalty under Section 271FAA applies where inaccurate information is furnished in the Statement of Financial Transaction or Reportable Account due to failure to comply with due diligence, deliberate action, false information from an account holder, knowledge of inaccuracy without informing authorities, or failure to correct after discovery within the short prescribed period; a reasonable-cause defence may preclude penalty.