Methods and systems disclosed herein for processing sheets of sheet material include receiving a sheet in a first sheet-accepting device. The methods and systems include detecting first information of the sheet, which includes a first serial number of the sheet. The methods and systems include receiving each of the sheets in a second sheet-accepting device. The methods and systems methods and systems include detecting second information of each sheet, which includes a second serial number of such sheet. The methods and systems include determining whether the first serial number of the sheet matches the second serial number of any of the sheets. The methods and systems include generating a report in response to determining that the first serial number of the sheet does not match the second serial number of any of the sheets.