a device in a sheet delivery for accommodating flat printed products , the device having a lowerable auxiliary sheet stack frame arranged between two side walls of the sheet delivery , includes respective lifting devices to which the auxiliary stack frame , at respective corner locations thereof , is articulatedly connected , a movable auxiliary stack receiving element mounted on and completely surrounded by the auxiliary stack frame , the auxiliary stack frame being of a length in a sheet travel direction substantially equal to twice the length of the auxiliary stack receiving element .