Embodiments are directed to a mobile bank card number generator for digital wallet. Embodiments receive a request from a user to perform an ATM transaction on an account owned by the user; in response to the request to perform an ATM transaction, generate a one-time bank card number associated with the account owned by the user; generate a readable indicia based at least in part on the one-time bank card number; and initiate communication of the readable indicia to an ATM, wherein the ATM receives a user authentication credential from the user, a bank system validates the user authentication credential and in response to validating the user authentication credential, approves the ATM transaction for the user's account.