A business sheet processing system according to an aspect of the present disclosure includes at least one memory configured to store instructions; and at least one processor configured to execute the instructions to: recognize a business sheet placed in a first area of a basket; control, based on the recognition result, extraction of the business sheet from the first area of the basket by a robot; determine whether the business sheet is sortable; control the robot to proceed a business sheet extracted by the robot and determined to be sortable to a sorting process; and control the robot to move a business sheet extracted by the robot and determined to be unsortable to a second area of the basket.

A sheet processing machine (10) with a jam detection device (44, 46), the jam detection device (44, 46) comprising a light emitting element and a light receiving element forming a light barrier in a detection zone (53, 78) of a processing station of the sheet processing machine (10). The jam detection device (44, 46) further comprises a control unit (48) being connected to the light receiving element and being adapted to register if the light barrier is interrupted.