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https://issues.apache.org/jira/browse/VALIDATOR-330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13885309#comment-13885309
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Sebb commented on VALIDATOR-330:
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I can confirm there's something rather odd happening here.
It should not be possible for both 01 and 98 to be correct, yet both return
true from isValid.
> IbanCheckDigit.isValid() returns True for some invalid IBANs
> ------------------------------------------------------------
>
> Key: VALIDATOR-330
> URL: https://issues.apache.org/jira/browse/VALIDATOR-330
> Project: Commons Validator
> Issue Type: Bug
> Components: Routines
> Affects Versions: 1.4.0 Release
> Reporter: Peter Shawe
>
> For example, isValid() returns True for both of these IBANs;
> "IE01AIBK93118702569045" and "IE98AIBK93118702569045". The "IE98" version is
> the correct one (confirmed with online checkers, which also fail the "IE01"
> version).
> calculate() correctly returns "98". As a workaround I'm calling calculate()
> and comparing the result with the checksum in the original IBAN.
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