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Method and Apparatus for Simplifying the Handling of Complex Payment Transactions

  • US 20090210299A1
  • Filed: 02/10/2009
  • Published: 08/20/2009
  • Est. Priority Date: 02/14/2008
  • Status: Active Grant
First Claim
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1. A method for payment with a payment device when a final transaction amount is not known upon first presentation of said payment device to a merchant, said method comprising the steps of:

  • charging a predetermined amount upon said first presentation;

    calculating said final transaction amount, subsequent to said first presentation, said calculated final transaction amount being made available to a central server;

    calculating a variable adjustment value by comparing said predetermined amount already charged with said final transaction amount, said calculated variable adjustment value being made available to said central server; and

    modifying a new predetermined amount charged, upon a subsequent presentation of said payment device, by said variable adjustment value.

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