The full form of CIF is Customer Information File . A CIF number is a unique 11-digit unique number assigned by banks to their customers to digitally store and manage their personal and financial information. CIF stands for Customer Information File Number, a unique identifier assigned to every customer by their bank. Learn how to find your CIF number and how it can help you access and manage your digital banking profile with Axis Bank. What Is a Customer Information File ( CIF )? A customer information file ( CIF ) in banking is an electronic file that stores an individual's personal and account data. Each file contains an 11-digit ... It’s more than just a number — your CIF links all your banking details in one place.