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To check for fraud we will typically:
1. Check MaxMind score.
2. Check FraudRecord for listings.
3. Verify geo::IP matches up with billing location.
4. Verify IP address owner belongs to an ISP that serves end-users rather than web servers (e.g., Comcast vs SoftLayer).
5. Credit card AVS check.
6. Credit card CVV check.
7. Number of failed payment attempts.
8. Unusual customer profile. For example, we don't accept orders from Gertrude Millicent with a billing address that traces back to a retirement home -- grandmas generally don't order VMs
9. Cost of the plan and the number of add-ons. Fraudsters often go for the highest value plans and add every possible add-on/upgrade.
10. If the customer has communicated with us through a ticket or sales e-mail, we'll evaluate their English. If they claim to be from Portland, OR but their English is horrible or they type in all capital letters -- then English is likely not their first language and they are likely not from Portland, OR.
Not all of those criteria would constitute an outright rejection of the order, but they play into consideration. If we're ever unsure about a payment, we'll request some sort of identity verification or the completion of a credit card authorization form.