Sheet processing systems and methods are provided, including systems and methods for advancing and organizing sheets. System can include an alignment mechanism having an alignment plate, a first advancing mechanism configured to individually advance each sheet of a series of sheets in a first direction from a lower feeder to the alignment mechanism, a second advancing mechanism configured to individually advance each sheet of the series of sheets in a second direction from the alignment mechanism to an accumulator, such that the second direction is substantially perpendicular to the first direction, a sensor configured to read an identification code of each sheet of the series of sheets, and a processor configured to control operation of the first and second advancing mechanisms based on sensor readings of the identification codes.