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A comment on Banks, Arbitrary Password Restrictions and Why They Don't Matter. Parent comment

Re:Banks, Arbitrary Password Restrictions and Why They Don't... by TeMPOraL on Wednesday September 18, 2019 @01:24PM (#21007682)
The simplest heuristic I can think of is that if you made another purchase yourself not long before or after the fraudsters did, it's easy to tell that you'd have to go supersonic for both transactions to be valid.
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Re:Banks, Arbitrary Password Restrictions and Why They Don't... by paranoidrobot on Wednesday September 18, 2019 @06:10PM (#21010840)
Reminds me of a video on the VINWiki youtube channel[1].

The tl;dr: Apparently Amex have some algorithm that includes flights and road travel options. Doing a Canonball Run (very high speed driving from one side of the US to another) triggers that.

[1] Relevant portion starts at roughly https://youtu.be/HkZNddd9Pxc?t=354

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