Imaging device and method for validating a document with selectable single side illumination

A scanning method for authenticating any laser image imprinted on a document comprising:

• a. illuminating any one surface of said document through an illumination source facing said surface;
• b. imaging opposite surface of said document wherein an illumination source facing the opposite surface is turned off;
• c. processing said imaging of opposite surface of said document in a data processor;
• said processing comprising
• i. detecting any laser image imprinted on said one surface of said document wherein said illumination source completely seeps through perforations of said laser image;
• ii. measuring amount of illumination source that seeps through perforations of said laser image;
• iii. contrasting said amount of seeped illumination source with a measured illumination source that seeped through perforations of reference laser image stored in said data processor.