There is disclosed a system and method for dispensing postage or other authorization information electronically by using a portable processor containing a maximum amount of preauthorized postage which can be applied to any piece of mail or other item. A plurality of shipping service providers may utilize the portable processor to store and dispense credit value for authorization of various shipping services. Accordingly, a user is presented with information regarding various shipping service providers fees and/or services associated with particular shipping/delivery parameters desired by the user in order to make an informed choice as to a most preferable method of shipment.