Abstract: Security apparatus (10) for the secure receipt and retention of articles (30) delivered thereto. The security apparatus (10) comprises a housing (12) having an upper chamber (14) and a lower chamber (16) separated from one another by a movable partition (15). The upper chamber (14) has an entrance opening (18) for the passage therethrough of a product (30) to be delivered to the apparatus (10) and a pivoted closure member (20) for said entrance opening (18). The movable partition (15) is slidable inwardly and outwardly of the apparatus (10) between respectively a closing position in which it separates the upper and lower chambers (14,16) from one another and an open position in which it permits inter-communication between the upper and lower chambers (14,16). Interaction means (25) are provided between the partition (15) and said closure member (20) whereby the closure member (20) can only be moved to open said entrance opening (18) when the partition (15) is in said closing position.