1. A machine, comprising: an input receptacle that accepts into the machine a stack of documents, the stack including both currency notes and checks; a transport mechanism that conveys the documents individually from the input receptacle; an imaging device operative to produce an electronic representation of at least a portion of a check that has been individually conveyed from the input receptacle; a validating device operative to assess the validity of a note that has been individually conveyed from the input receptacle; and a sorting unit operative to sort the individually conveyed notes into at least one bin which contains notes assessed as valid through operation of the validating device.