If the ATM transactions of your Post Office Savings Account (POSA) are failing repeatedly, then NPCI has given the reasons .Let's know the reason why ATM transactions fail and what is the solution?.The ATM works only till the date specified on the ATM card. The card will not work after that date.If you want to get a new card, you will have to apply at the post office.If you forget the ATM PIN, the transaction may fail. You have to always remember the PIN.Before withdrawing money, the balance of the account must be checked because the transaction will fail .You cannot withdraw more than Rs 2500 from ATM in a day. Withdrawing more money than the limit will lead to the transaction failure .According to NPCI, ATM problems are mostly due to non-technical reasons. NPCI offices are trying to fix problems .If problems persist, contact the post office. From there, you will easily get a solution to problems related to balance