Declines can happen for a variety of reasons. When we submit a charge to your customer’s bank, they have automated systems that determine whether or not to accept the charge. These systems take various signals into account, such as your customer’s spending habits, account balance, and card information like the expiration date and CVC.
Since these signals are constantly changing, a previously successful card might be declined in the future. Even if all of the card information is correct, and your customer previously had a successful payment, a future charge can still be declined by a bank’s overzealous fraud systems.
To ensure charges go through, have your customers double check that they are using their correct billing address, zip code, card expiry, and CVV code when sending charges.
For more information about a specific decline, contact firstname.lastname@example.org. However, note that many banks do not provide more information than "general decline", so we may not be able to provide more information.