A delivery of a sheet-processing printing machine has a sheet-pile stacking station whereon a safety guard is provided which is suspended from a pivot pin and, at least during a regular sheet-pile forming process, provides a view of a downline top edge of the sheet pile, as viewed in the processing direction. In this regard, the safety guard is constructed so that it is swingable together and swingable apart in the manner of a hinge, via a hinge pin disposed parallel to the pivot pin; and a machine for processing flat printing materials, and a sheet-processing printing machine, respectively, equipped with the delivery.