Credit Cards Being Declined on my Store
When you use an online payment gateway to process credit card payments, orders can sometimes decline due to a variety of different reasons. Fortunately, your Shift4Shop store records the various responses that come from your payment gateway and places them on the order for your review. This way, you can contact your payment gateway with the applicable error code and simply ask them what it means.
From your Shift4Shop Online Store Manager:
Go to Orders to view your store's orders.
Then, click on the Not Completed tab found at the top.
Go to the far right of the order and click on its Action > View button.
Scroll all the way down to the bottom of the order and look for the "Order Comments" section. This section will only display if there was an actual response from the gateway
View the Response given which will appear directly below the "Internal Comments' section.
Contact your payment gateway with the response given to see why the decline may be happening.