A system for making commercial transactions through a paper document includes: a device (3) for reading and scanning the paper document containing information useful for a commercial transaction, the reading and scanning device (3) having an IP address; a user device (5); an interface (7), in particular a connection, between the reading and scanning device (3) and the user device (5), wherein the reading and scanning device (3) includes a software interface adapted to exchange data and/or the information with the user device (5) through the interface (7) and via the HTTP protocol.