(I work at Stripe) Stripe's already actioning charges based on the feedback from the machine learning models. We hope that they'll take care of most fraud for y

(I work at Stripe) Stripe's already actioning charges based on the feedback from the machine learning models. We hope that they'll take care of most fraud for you. If you do want to write custom rules on top of what the models are doing, we've actually built in a testing interface to the rule creation process. When you test a rule, we'll actually simulate what the rule would have done had it been active for the past 6 months. Using that information, you'd be able to tell the # of legitimate, fraudulent, or already blocked payments that would have matched the rule & make a decision on what's best for your business. That said, we're looking to make our opinion on a given rule more clear (rules are still in beta) and would love more feedback on how we can make this better. Feel free to drop me a line (tara@stripe.com) if you have feedback!