CBI has registered a case against a cashier working at a State Bank of Bikaner and Jaipur branch in Rajasthan for allegedly exchanging Rs 1,000 and Rs 500 notes for new ones worth more than Rs 1 crore post demonetisation.An FIR was registered against the official based on a complaint filed by the manager of the bank’s Collectorate Branch in Dausa, Rajasthan. It was alleged that Yogendra Singh Merna, posted as Head Cashier, violated guidelines to allow exchange and deposit of scrapped notes.