Ans: Once individuals open their PPF account in a post office or bank, they are provided with a passbook that contains the PPF account number. If the individual has opened the account online, the PPF account number will appear on the screen after the completion of the account opening process. The person needs to note down the number or take a printout for future reference. Moreover, one can also visit the net banking portal and click on the PPF account on that portal. There, the individual will find the account number.