Pretty much everyone who deals with fraud has to accept a certain percentage of false positives. And if you reveal too much about how you detect fraud then the

Pretty much everyone who deals with fraud has to accept a certain percentage of false positives. And if you reveal too much about how you detect fraud then the fraudsters start to adapt and become harder to detect, supplying extra information has a very real cost. There's also a reasonable chance that even if they wanted to tell you they might not be able to do so. More and more this sort of detection takes place using machine learning algorithms which use hundreds of factors to evaluate risk rather than just being a simple rule which they can inform you about. Whenever you use a platform for financial transactions you should always consider what risks the platform is taking in letting you conduct that transaction and how they mitigate that risk.