Section 16(1) in The Post Office Savings Bank General Rules, 1981
(1)Where an account is found to have been opened incorrectly under a category other than the one applied for by the depositor, it shall be deemed to be an account of the category applied for if he was eligible to open such account on the date of his application and if he was not so eligible the account may, if he so desires, be converted into an account of another category ab-initio, if he was eligible to open an account of such category on the date of his application.
