• @x4740N@lemmy.world
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      21 year ago

      You are right but I do sometimes see that same type of barcode stamped on some Australian letters but I’m not sure what it’s used for

    • @x4740N@lemmy.world
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      21 year ago

      You are right but I do sometimes see that same type of barcode stamped on some Australian letters but I’m not sure what it’s used for

    • brianorca
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      21 year ago

      Probably a serial number for the stamp. In the US, you can even pay online and print your own stamp, and it uses the barcode to track when you use it, so it can’t be used twice.