I fully agree with the author. We must take and also preserve the transaction slip from ATM. This transaction slip would be immensely helpful in case we don't receive money from ATM but the amount gets deducted from our account. However, I have seen that in many cases the ATM machine doesn't print the transaction slip. This happens mainly with private banks. In such case, it becomes very difficult to substantiate our claim if the money is wrongly deducted from our account.
Caution: Explosive. Handle with care.