Duplicate EM Cards

Duplicate EM Cards

The reason why the card number is showing duplicate for Access Card when enrolling to Access Control Systems, is that the card reader might be reading only the first 6 to 8 numbers of the card.

Here is the example.

Card numbers are;
1234500001
1234500002
1234500003

As you can see if their card reader is only reading the first 6 to 8 numbers of the card, therefore it show duplicates.

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