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Technical help needed -- not sure where to look

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gt94sss2
Posts: 102
Joined: 29 Dec 2020, 18:16
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Re: Technical help needed -- not sure where to look

Post by gt94sss2 »

tuxtattoo wrote:
07 Jun 2022, 11:52
Can somebody tell me where to find the procedure by which this check digit is calculated?
https://en.wikipedia.org/wiki/S10_(UPU_standard)