What do you do when you're unsure a new transaction is fraud but are suspicious?
 

The last few days I've had a 6 month and a 12 month membership purchased on my site, and going through my payment gateway's risk management services I haven't found anything that would clearly indicate fraud, such as high transaction count or high card count, and the IPs match the address. I did see though that they only show one login, and for one of them the email address has an English name while the customer name is Chinese. Would you ever do a preemptive cancellation of a membership and refund to avoid a possible chargeback through your bank? Or would you just wait it out and hope you don't get one?