1. Stolen credit cards are becoming a commodity, so the fact someone knows all card details can't be sufficient to authorize a transaction. Use device reputation services, and analyze the user behavior on your website. Fraudsters operate differently and tracking the user interaction, habits, cognitive choices and behavior can help you spot fraudulent activity.

  2. Consider using Verified by Visa and Master Securecode schemes. They guarantee you against credit card fraud - but you still need to keep your fraud levels low, or lose the protection.

  3. If you have physical point-of-sale devices, follow the advice on Trojans - otherwise you can be compromised just like the big retailers.

  4. Fraudsters turn to Remote Access (RAT) tools so they can piggyback a valid user device and enter their account uninterrupted. Many retailers lower the guards when an existing user comes from a trusted device, but that's exactly what fraudsters will try to exploit using RATs such as TeamViewer, LogMeIn or any advanced Trojan they can infect the user with. Don't assume everything is fine just because the user comes from their good old device - and use RAT detection capabilities to tackle this specific type of fraud.

  5. Remember that  at the end of the day, it's all about usability. Don't throw more and more security on your users - you do want to keep a good user experience.Look for frictionless controls.

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