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Anyone who has an Amex would notice this immediately. The last digit is the Luhn check digit and the digit before that increments each time a card is issued, starting from 0.


Either it's only a specific kind of amex, or it's not starting from 0, or this is incorrect information.

I've got 2 AMEX cards - one reissued and ends with 0, another issued the first time and ends with non-0. (I'm ignoring the check digit)


I've just pulled a load of expired my Amex cards. It looks like I got the incrementing digit wrong. On my cards it's the 4th from last that increments. UK Amex FWIW.




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