An invalid or missing expiration date might mean the customer doesn’t have the actual
card in hand. Ask for more information if you receive an authorization but still suspect fraud.
Ask for the name of the bank that appears on the front of the card.
Contact the cardholder with any questions.
Confirm the order separately by sending a note via the customer’s billing address rather than the “ship to” address.
Larger than normal order
Order that includes several of the same item
Order with many big-ticket items
Rush or overnight shipping requested
Shipping to an international address
Transactions with similar account numbers
Transactions placed on multiple cards all shipping to a single address
Multiple transactions on one card over a short period of time
Multiple transactions on a card with a single billing address, shipping to multiple addresses
Multiple cards used from a single IP address
Orders from Internet addresses that make use of free e-mail services