To find the CIF number in IDBI Bank of India, you can check your bank passbook or the first page of your chequebook, where the CIF number is usually printed. Another method is by logging into your Internet banking account; the CIF number is often displayed on the dashboard or in the account summary section. Alternatively, you can visit your home branch and ask a bank representative to provide the CIF number. If you prefer calling, contact IDBI customer care and verify your identity to get the CIF number over the phone. Each method is straightforward and helps you access your CIF number easily.