CIF stands for customer information file that contains all financial history of account holders. You can find your CIF number online and offline on various places... What is CIF Number, its full form, and why it's crucial for banking. Learn how to check and obtain your CIF Number, along with its benefits and importance. What is a CIF Number? CIF means Customer Information File. This is a unique 11-digit or 9-digit (varies from bank to bank) code that serves as a digital identifier for each customer. Find out everything you need to know about the CIF number of SBI and how to locate it through passbook, chequebook, net banking, YONO app, and more.