Use of public switched telephone network for capturing electronic signatures in on-line transactions

secure system for capturing electronic signatures comprising: a system (44) switched telephone network communication type and a second system (26) of communication, different, at least in part, the communication system type telephone network; a site (31) document provider, coupled to the second system (26) communication to present a document to a party (K) via the second system (26) communication and is capable of executing instructions to obtain an indication that the party wishes to proceed with the document, following the indication of the site (31) document provider is capable of generating a unique document identifier and send the identifier to the party (K) via the second system (26) Communication; and a site (38) service, coupled to the second system (26) and communication system (44) telephone communication network type and is capable of: obtaining a phone number for the part (K) to start communications with the part (K) through the system (44) communications type telephone network; execute instructions to contact the party (K) through the system (44) telephone communication network type; and execute instructions requesting the part (K) identifier through the system (44) telephone communication network type.