[ic] Credit card LUHN checking

[Jonathan Clark]

> When placing trial orders in Interchange 4.6.5 (with a valid credit card
> number) I receive following error message:
>
> Credit Card Information (Credit card number fails LUHN-10 check.)
>
> How do I disable this, as all credit card processing for the site will be
> done manually.

Why wouldn't you want LUHN-10 checking done?

This ensures you don't have to process orders with bogus cc numbers and then
contact the customer to get the correct number.

To test use 4111 1111 1111 1111.

Jonathan
Webmaint.