[mike_hock]

This is also

a) trivial to bypass by adding dither to the test transactions and

b) trivial to improve upon with proper statistical analysis and

c) shouldn't this kind of heuristic pattern recognition with no expectation of near-100% accuracy be what AI is good at?

[aleph_minus_one]

> a) trivial to bypass by adding dither to the test transactions and

I know someone who worked in fraud detection of financial transactions. He told me that indeed lots of filters that are applied mostly test for anomalies. The thing is that most criminals are not insanely smart, and commonly don't have a lot of inside knowledge about accounting, banking, finance system etc., so criminals often have a bad intuition about more subtle things that are looked at for fraud detection.

But if you are a very dedicated criminal with lots of inside knowledge about, say, accounting, banking, finance system, ..., you could likely outsmart these filters. But these people typically have much better career options (even if they want a career as a "big fish criminal": just look at the history of accounting scandals, stock manipulations, Ponzi schemes, ...).