Yeah, there's definitely edge cases that make this difficult — though these are the same problems that users may already face on existing P2P exchanges — now we're just getting more involved in the customer service and support :D.

The best risk mitigation here is having trusted, verified sellers that we've met + a robust support functionality that allows users to indicate any issues. To be honest though, in some of these countries, the domestic payment systems (e.g., UPI in India) are quite reliable.

Re AML -- we do KYC, and we discourage / don't present cash as an option. That way the payments happen through more transparent channels.