New Delhi-Biometric identity number Aadhaar linkage with bank accounts is mandatory said RBI.Reserve Bank of India clarification followed media reports quoting a reply to a Right to Information (RTI) application which suggested the apex bank has not issued any order for mandatory Aadhaar linkage with bank accounts.But RBI, in a statement, clarified that linkage of Aadhaar number to bank account is mandatory under the Prevention of Money-laundering (Maintenance of Records) Rules.