A system and method are provided for facilitating proof that a specific item, such as a document, has been sent via a communication medium, such as the mail service of the United States Postal Service, at a specific time. A bit map image is produced, such as by scanning a hard copy document. Preferably...http://www.google.de/patents/US5926551?utm_source=gb-gplus-sharePatent US5926551 - System and method for certifying content of hard-copy documents
