Indian Banks’ Association has advised Banks regulated by RBI to ensure that the KYC Identifier generated by CKYCR is duly communicated to the Individuals/ Legal Entities so that they can contact the bank/notifier in case they observe any discrepancy in the details uploaded.
Regulation on Aadhaar Masking: Master Direction – Know Your Customer (KYC) Direction, 2016 (Updated 29 May 2019): RBI Aadhaar masking mandatory guidelines
This link gives you a detailed explanation by RBI to redact the aadhaar number before storing into system.
Important Notification regarding IU by RBI
Important Notifications regarding FATCA CRS regulatory reporting purpose by RBI.