A method for authenticating a check of a plurality of checks where the check was previously issued from a first party to a second party, including receiving first information from the first party, storing the first information in a file of a third party and receiving the check. The check has first party identifying information, a unique pseudorandom number of a pseudorandom sequence, and an amount. A status of activating the plurality of checks is determined. At least a portion of the first party identifying information included with the check, the unique pseudorandom number included with the check and the check amount included with the check are authenticated. The received check is authenticated if the first party, the unique pseudorandom number included with the check and the amount included with the check are authenticated and if the plurality of checks have been activated.