Abstract: Banking machines for dispensing paper currency require a document transport for accurately and reliably delivering a single bill or piece of currency from a storage bin to a customer. The document transport includes a feeder unit for delivering single pieces of currency from a stack to a pair of separator rollers and past a double document detector. Upon detection of more than one document passing through the separator rollers, a clutch is energized to cause one of the rollers to rotate in a direction opposite the other to separate the several bills and allow only the top one to be forwarded into a flat belt transport. As a piece of paper currency passes through the flat belt transport, spaced detectors produce a signal that indicates an overlapping or trailing document condition. This overlapping or trailing condition is measured by the spacing of detectors in the flat belt transport.