A person's KYC details were used by a private bank to add them as a co-applicant for an unknown business loan in 2019, negatively impacting their CIBIL score. The bank admitted it was a mistake but has yet to rectify the situation or issue an NOC. Expert advice suggests reporting the issue to the Ombudsman, issuing a legal notice, and potentially pursuing action through the consumer redressal commission. Filing an FIR with the police and lodging a complaint with the RBI are also recommended due to potential fraud and unfair banking practices.