Systems and methods are disclosed for automated computer based notification systems. The systems and methods enable secure notification communication sessions. A representative method, among others that are disclosed herein, can be broadly summarized by the following steps: enabling a first party associated with a personal communication device (PCD) to input or select authentication information for use in connection with a subsequent notification communication session involving advance notice of a delivery or pickup of a good or service at a stop location by a mobile thing (MT); storing the authentication information; monitoring location or travel information in connection with the MT; causing initiation of the notification communication session to the PCD, in advance of arrival of the MT at the stop location, based at least in part upon the location or travel information associated with the MT; during the notification communication session, providing the authentication information to the PCD that indicates to the first party that the notification communication session was initiated by an authorized source; and during the notification communication session, enabling the first party to select whether or not to communicate with a second party having access to particulars of the pickup or delivery. An embodiment of a related system, among others, has a computer-based architecture with computer software, or code, that is stored in one or more memories and executed by one or more processors for performing the foregoing steps. Yet another embodiment of a related system can be implemented in software and/or hardware and has a means for performing each of the aforementioned steps.