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Method and system for duplicate commercial paper detection

  • US 7,178,721 B2
  • Filed: 02/08/2006
  • Issued: 02/20/2007
  • Est. Priority Date: 11/19/2004
  • Status: Active Grant
First Claim
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1. A method for detecting duplicate commercial paper transactions comprising:

  • receiving an authenticated commercial paper transaction with a check identification code, the check identification code comprising a plurality of fields and the commercial paper transaction authenticated using a first hash value based on at least a portion of the plurality of fields;

    updating the check identification code because of processing of the received transaction;

    determining a second hash value based on at least a portion of the updated check identification code;

    communicating the second hash value to a repository storing a plurality of hash values, each hash value associated with one authenticated commercial paper transaction;

    if the repository does not include the second hash value as one of the plurality of hash values, authenticating the processed commercial paper transaction; and

    if the repository includes the second hash value as one of the plurality of hash values, identifying the processed commercial paper transaction as a duplicate.

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