What is UKN? Unique Know Your Customer Number (UKN) will be issued by NCCPL after successful completion of verification process of the client. Unique Identification Number (UIN) shall have the same meaning as ascribed thereto under the NCCPL Regulations, 2015. Upon such verification, CKO will approve KYC Application Form in KIS and Unique KYC Number (UKN) will automatically be generated for. Get to know about U.