Test cases for payment gateway

My example is PayPal manager based:-

1) Test with valid card number with valid expiry but invalid CVV.

2) Test with valid card number with invalid expiry but valid CVV.

3) Test with valid card number with invalid expiry and CVV.

4) Test with valid details of expired/blocked card.

5) Test with valid card number, CVV and expiry date.

6) Test for reference transaction.

7) Test for billing/shipping details in payment manager.
 Test for back payment to customer.

9) Test for "0" transaction.

10) Test for negative transaction.