CRN or customer relationship number is a unique identifier of the customer in Kotak Mahindra Bank. Your CRN is the number under your name on your Debit/Credit Card. CRN stands for Customer Relationship Number. Your Customer Reference Number (CRN) is an eight-digit number that can be found on the address label of your The Economist newspaper. Hi friends welcome to my channel, About this video:- How to get Kotak Mahindra 811. Kotak bank CRN number kaise pata kare||how to check crn number kotak bank|| cif.