The exchange of documents for signature can be performed efficiently using an automatic routing system that associates a document with appropriate identifying metadata. The routing can be facilitated through facsimile in which the metadata is encoded on a return facsimile cover sheet that is routed with the document. Appropriate central exchange servers have appropriate input and out subsystems to perform the document routing. The executed documents can be conveniently archived for efficient document storage and access, such as network access to one or more of the parties.