• Ship-to address differs from the Bill-to address.
• Bill-to is a US card holder and ship-to is and overseas recipient.
• Order is rather large.
• Items do not "fit" with each other.
• "Customer" wants Express mail or FedEx overnight.
• Multiple units of the same item.
• E-mail address is an account from free e-mail providers (e.g. hotmail.com, findmemail.com, etc.) or from an "inactive" domain (a domain showing a "coming soon" page).

Please note that ALL the above mentioned signs may occur combined in a legitimate order.  It is very unlikely to happen but it is possible.   Please check "Fraud Protection on Suspicious Orders" to see some ideas as to how to combat fraud.

Note:  For tips on how to find the issuing bank of a credit card click here.