Abstract: An authentication value is provided in a magnetic-ink field of a negotiable instrument. The authentication value is derived from application of an encryption algorithm defined by a secure key. The authentication value may be used to authenticate the instrument through reapplication of the encryption algorithm and comparing the result with the authentication value. The instrument is authenticated if there is a match between the two.

Abstract: A method of processing negotiable instruments includes receiving a message at a host computer system of an entity that processes negotiable instruments from a client computer of an entity that issues negotiable instruments. The message comprises a request to receive a list of negotiable instruments paid by the processor and issued by the issuer. The method also includes transmitting a file from the host computer system to the client computer. The file includes the list at least one selection arrangement for at least one item in the list. The at least one selection arrangement is programmed to receive information from the issuer relating to issue information for the at least one item. The method also includes receiving at the host computer system issue information relating to one of the items in response to a selection using one of the at least one selection arrangements.