1. A system for determining whether a document has been created by photocopying or laser printing, the system comprising: a detector that detects microdots of toner or other substances employed in photocopying and laser printing on the surface of a document; and an output device that, in response to detection by the detector of microdots of toner or other substances employed in photocopying and laser printing on the surface of a document, outputs an indication that the document has been created by photocopying or laser printing.