A sheet processing apparatus includes a first storage and a second storage that each stores a sheet; a transport that transports the sheet; a recognition circuit that performs a first recognition processing to recognize the sheet; an outlet that discharges the sheet in a case that the sheet is recognized as normal in the first recognition processing; a temporary storage that stores the sheet in a case that the sheet is recognized as abnormal in the first recognition processing; and processing circuitry that controls the transport and the recognition circuit such that storage control processing is performed, the storage control processing being processing in which the sheet stored in the temporary storage is transported to the first storage unit or to the second storage.