Abstract: Disclosed are methods for a system having a payment switch and a retailer. In a plurality of cards, a first signal corresponds to a signal common to the plurality of cards, and there is a second signal on a first card in the plurality of cards. The method includes receiving the second signal from the point of sale; accessing the bank account, by using the first signal and the signal received in the previous step; responsive to a failure to withdraw funds from the bank account, accessing the bank account to withdraw a fee; and making an accounting system entry corresponding to a first amount the first amount being a portion of the fee owed by the first business entity to the retailer.

Abstract: Disclosed are payment system and methods.

Abstract: Disclosed are payment system and methods.

Abstract: A system and method of securing an entryway is provided. The entryway includes a wall, a door frame, a door disposed therein, and a floor area. The system/method includes securing an access portal to the wall and to the floor area, the access portal having at least one door moveable from an open position to a closed position. The system/method further includes maintaining the at least one moveable door in a closed position based on at least one of: detection of more than one person in the cabin at a time; detection of contraband present in the cabin; or detection of a person in the cabin wearing a mask or disguise.