7? Wow. We find that orders below 3 are usually legit and anything over 4-5 needs to be manually reviewed. We usually request a copy of a photo ID or electric/phone/etc bill with name and address on it if the order scores anything above 4-5 or comes from an open proxy.

If a lot of fraud orders are still getting in I'd suggest deploying MaxMind's telephone verification system.

Fraud checks aren't always fail proof. We've had someone with a score of .03 that ended up being fraudulent.