Abstract: A digital check transaction system including a receiver which receives, from a requestor, a request for confirming whether a check can be endorsed to a recipient to complete a transaction between the requestor and the recipient, a processor which processes the received request to determine whether the check can be endorsed, and a transmitter which, in response to the processor determining whether the check can be endorsed, transmits a response to the requestor indicating whether the check can be endorsed.

Abstract: A food delivery box made of a single sheet comprising a plurality of vertical and horizontal creases substantially perpendicular to each other. Side surfaces are provided that can be bent along the horizontal folding creases. A big upper cover is provided that can be bent along the vertical folding creases. A big base is provided that can be bent along the vertical folding creases. The food delivery box is formed by folding the big upper cover and the big base along the vertical creases and by folding the side surfaces along the horizontal folding creases.