Ask HN: How do you deal with fraud, is there an easy way?

We're a new service and we use stripe we've had about 30 fraudulent transactions put trough and we don't know how to stop this person from putting more, Stripe only goes so far, it's fairly easy to fool.

It's costing us ~ 0.7$ every time we need to refund which is sort of annoying. Also it's a waste of time.

How do you guys deal with this?