Prime Minister Mr.  Manmohan Singh walks into State Bank of India to cash a cheque. As he approaches the cashier he says - ‘Good Morning, Ma’am, could you please cash this cheque for me?’

Cashier - ‘It would be my pleasure, Sir. Could you please show me your ID? ’ PM - (utterly shocked) ‘I did not bring my ID with me as I didn’t think there was any need. I am Manmohan Singh, the Prime Minister of India!’
Cashier - ‘Yes Sir, I know who you are, but with all the regulations and monitoring of the banks because of impostors and forgers, etc., I must insist on seeing your ID.
’ PM - ‘Just ask anyone here at the Bank who I am and they will tell you. Everybody knows who I am!’ Cashier - ‘I am sorry Mr. Prime Minister, but these are the bank rules and I must follow them strictly.’

PM - ‘I am urging you, please, to cash this cheque. Soniaji has gone to America and Rahulji has, by mistake, taken the keys of the safe with him. I need some extra spending money urgently.’

Cashier - ‘Look Mr. Prime Minister, this is what we can do. Some months back, Baba Ramdev came into the bank without ID. To prove he was Ramdev, he pulled his tummy in so much that it went and touched his back. With that feat, we knew him to be Baba Ramdev and cashed his cheque. On another occasion, Yuvraj Singh came in without his ID. To prove his identity, he just went out and hit six consecutive sixes. With that we knew for certain that he was indeed Yuvi himself, and we cashed his cheque.
So, Mr. Prime Minister, what can you do to prove that it is you, and only you, as the Prime Minister of India?’ PM stood there thinking, thinking and thinking, and finally said - ‘Honestly, my mind is totally blank ~ there is nothing that comes to my mind... I can’t think of a single thing!!!’
Cashier - ‘There you are! That is enough. Now I don’t have any doubt that you are our Prime Minister Dr. Manmohan Singh. In what denominations would you like the cash, Mr. Prime Minister?