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This doesn't seem really smart since some of those apply to me. I am not from America and I sometimes order from there meaning it would seem like I'm ordering at 4am when its 2pm my time. Another thing is the email, I know a lot of people with their birth year inside their email. What about them?

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Sift intern here.

We use the time zone of the customer rather than of the website for scoring riskiness. Sorry if that wasn't clear.

As for customers including birth years in their emails, you're correct that this would be counter to the general trend. However, a fraud detection system like Sift has many data points on which to score a customer. Hopefully, the person would otherwise look benign and thus not have a very high overall score.

Thanks for clarifying that. I though it used the server time.

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