The invention relates to a system for allowing a quality check of sausage shaped products. The system includes a filling tube for feeding filling material into a tubular packing casing. The system further includes a clipping machine having a displacer unit with at least two pairs of displacer elements for gathering the filled tubular packing casing and for providing a plait-like portion. The system further includes a clipping unit for applying two closure means to the plait-like portion of the tubular packing casing, and a feeding unit for feeding flexible suspension elements to the clipping unit. The system further comprises a discharge device for by-passing the transportation unit by at least one of the sausage-shaped products and for discharging the by-passed sausage-shaped product out of the clipping machine.