| 摘要 |
The invention concerns a merchandising arrangement in which a coded check is used. Upon the issuance of the check the code of the check is stored in a storage means. For obtaining purchased articles of merchandise the check is presented to a decoding means which sends a signal corresponding to the code to the storage means. If the storage means contains the code, the check is validated and the code is erased from the storage means. Random number generators and other features are disclosed to make the code unpredictable or not available to unauthorized personnel.
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