A commissioning device having a first shelf row with horizontal shelf surfaces and at least one second shelf row with multiple shelf surfaces disposed one above the other and forming storage shafts. A lane formed between the first and the second shelf rows includes an operating unit movably disposed in the lane. The commissioning device also includes an input device, an output device and an auxiliary output device. The operating unit includes a gripping device for inputting and/or outputting piece goods onto or from the horizontal shelf surfaces and for filling the goods into the storage shafts. A control unit coupled to the operating unit is configured to output identical piece goods in a row from the horizontal shelf surfaces, to input the piece goods into the storage shafts and to output and transfer one or more piece goods located on the horizontal shelf surfaces to the auxiliary output device.