小额跨境交易的KYC/AML：界限在哪里？

That's a tricky one because it really does vary a lot. From what I've seen, it's less about a hard dollar amount for individual transactions and more about the cumulative flow and risk assessment. Many platforms use AI to flag suspicious patterns even with small amounts. It's a legal minefield for them.

That's a really good question, especially with so many fintech apps for international payments now. I've always wondered about the cumulative volume part – if I send ten $50 payments, does that eventually trigger something even if each individual transaction is small?

It definitely varies by jurisdiction, but generally, regulators look at cumulative volume and patterns rather than just individual transaction size. Many platforms will implement KYC even for smaller amounts if the user's activity triggers certain risk flags, which is often tied to annual or monthly limits.