| 摘要 |
A method for implementing a sales transaction includes receiving a first payment, issuing a prepaid sales certificate having indicia indicating a first redeemable value for the certificate corresponding to the first payment, and having indicia indicating at a later time a second redeemable value greater than the first payment. The prepaid sales certificate may be received by a merchant, and a determination made whether the later time has passed. Based on the determination whether the later time has passed, at least one of goods and/or services may be provided in exchange for the prepaid sales certificate based on the first redeemable value or the second redeemable value.
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