Discover Credit card validation on checkout giving error and loosing clients.

[lucasvm]

Hello

 Im running Magento 2.1.7 and some clients contacted me to tell me that some Discover cards numbers are not working on checkout process.

 Error message: Please enter a valid credit card type number.

 Test card example: 6011111111111117.

 Thats a valid card number working on others payment processor, also clients cards.

 Any ideas on how to fix this?

[richardgra7558]

Discover requires a minimum annual income of $25,000 to ensure that you can make your monthly payments for credit card validator, and if you don't meet the minimum income requirement, you likely won't get approved. Discover verifies income by requesting pay stubs and bank statements.