| 摘要 |
Stamps such as postage stamps, fee stamps, etc., involve the problem of being machine testable with respect to their position on the carrier and their authenticity, and of assuring that they can only be used once. A stamp is proposed with characterizing printing thereon and an adhesive layer for attaching it to a carrier, said stamp containing a machine-testable marking material suitable for automatic processing, the marking material being provided in the adhesive layer.
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