A sheet processing apparatus includes a laterally moveable post-processing module moveable from a predetermined operating position to a predetermined lateral delivery position and a control unit. The control unit is configured to operate the post-processing module such that a lateral delivery position for a set of at least one sheet is determined, the post-processing module is moved to the operating position, the post-processing module is operable to subsequently engage the set of at least one sheet to obtain a processed set of at least one sheet, then move the post-processing module from the operating position to the delivery position in coupling engagement with the processed set of at least one sheet, to move the processed set of at least one sheet to the lateral delivery position and disengage the post-processing module to deliver the processed set of at least one sheet at the lateral delivery position.