Yup. Having been on this side of the fraud business, I empathize with the OP but will definitely defend overly-aggressive fraud systems. As you make more mone

Yup. Having been on this side of the fraud business, I empathize with the OP but will definitely defend overly-aggressive fraud systems. As you make more money, it's less of an impact on your business, and you can tone them down. But at day 1, if people are only signing up for your service to see if their stolen credit card numbers work, there might not be day 2 unless you're aggressive about blocking this. So, sometimes innocent civilians will get caught up in the safety net.