As of September 2019, we are using a Credit Card provider that validates information in the account with the Credit Card provider. In order for a successful Credit Card transaction, you must enter the correct address and telephone number at the time of the Credit Card transaction. If the information is not correct, you will have the opportunity to enter a separate billing address and telephone number. This is especially important in the terms that if you are using a personal Credit Card for a business or a Customer's Credit card for your own Development.
We are also using a system which automatically updates the credit card numbers when they are close to expiry. This is still experimental and still being tested.