Patent attributes
In one embodiment, a payment service system-implemented method of assigning payment card numbers for individual user accounts associated with the payment service system includes receiving a request, in the context of an authorization for a payment transaction, to assign a payment card number to a user account associated with a user of the payment service system. The method includes retrieving, from a database associated with the payment service system, an account record associated with the user account. The method includes determining that the user account is not associated with an active payment card number. The method includes identifying an unassigned payment card number and modifying the account record to assign the unassigned payment card number to the user account as an active payment card number. The method includes authorizing the payment transaction using the active payment card number, causing a modification to an account balance of the user account.
