Support for Israeli local credit cards
MasterCard's local (Israel only) cards has a different numbers structure, therefor, they cannot pass WHMCS internal credit card check (They are using MOD11).
The implementation is very simple and requires a small change to the ccfunctions.php file (an example is attached).
WHMCS where kind enough to send us a modified version of ccfunctions.php so we can confirm it's working, just need to implement this in the core releases.
(whmcs staff - you can review ticket #351803)