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Are postage stamps machine readable?

FrankHFrankH Posts: 773 ✭✭✭✭✭

Reason I ask is that when I was a kid and collected stamps, I mailed some envelopes to myself with foreign stamps and they were delivered with no problem.
Sooo... have they made stamps readable when sent?

:)

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    JBKJBK Posts: 14,755 ✭✭✭✭✭

    I'm pretty sure the answer is "sort of".

    They aren't readable for denomination, but they do have a phosphor tag (either strip or whole stamp) that allows the machine to orient the envelope so that the address/zip can be read.

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