Rising frauds and cases of misappropriation of funds from ATMs has led Reserve Bank of India to make only one transaction allowable with single entry of ATM PIN. This means for every transaction one makes, he has to re enter his ATM PIN.

Previously, customers could make multiple transactions by entering the PIN only once when the card was inserted in the ATM. This process made the card more vulnerable to misuse.

Various cases of the ATM machine getting tampered in such a way that the customer is unable to collect his card after the transaction has led to many people losing money.

Private sector bank HDFC Bank said: "As per RBI guidelines, you will need to re-enter your ATM PIN for every additional ATM transaction in a single session, with effect from 1st January, 2011".

"Please ensure you enter the correct ATM PIN for every transaction to avoid any inconvenience," the bank said.