1. A document acceptor for authenticating and storing documents, the document acceptor comprising: a document validator configured to authenticate received documents; a document cassette configured to store the documents received by the document validator; and a displacement actuator including a housing, a lever, and a cam operatively coupled to the lever, wherein rotation of the lever causes the cam to transition between a first cam position and a second cam position, wherein the cam is configured to interface with the document cassette when moving to the second cam position to change a position of the document cassette from a first position to a second position to mate the document cassette with the document validator, wherein the housing is adapted to removably secure the displacement actuator to a document acceptor, and wherein the housing is held in a fixed position relative to the document validator while the position of the document cassette is changed.
7. The document acceptor of claim 1 , further comprising a chassis coupling the document validator and the displacement actuator, the displacement actuator including a housing being removably secured to the chassis.