| 摘要 |
An improved system is provided for authentication of mail pieces bearing bar - coded indicia. The system comprises first and second bar-code readers (23, 28), differing in that the first bar-code reader has a lower rate of successful reading of bar-coded indicia than the second bar-code reader. The system collates a mail piece bearing an indicium in a second paper path (26) in the event of a successful reading of the bar-coded indicium by said first bar-code reader, and collates mail pieces in a third paper path (25) in the event of an unsuccessful reading of the bar-coded indicium by the first bar- code reader. The third paper path leads to the second bar-code reader, and t he system collates mail pieces in a fourth paper path (30) in the event of a successful reading of the bar-coded indicium by the second bar-code reader. The system collates mail pieces in fifth paper path (33) in the event of an unsuccessful reading of the bar-coded indicium by the second bar-code reader .
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