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Re:Privacy – Forget Your Credit Card by pfarnsworth on Thursday March 24, 2016 @08:24PM (#11357641)
AMEX has this almost 20 years ago but they stopped it for some reason. I personally loved the feature.
Re:Privacy – Forget Your Credit Card by unclebucknasty on Thursday March 24, 2016 @09:43PM (#11357956)
Yeah, I was a user. It was called Private Payments and went back at least as far as 2000.

Here's an interesting article from 2000 [1], declaring it basically unnecessary because cards were safe in transit. Some of the quotes and rationale are hilarious. Definitely from the pre-breach-of-the-month era.

[1] http://www.forbes.com/2000/09/08/mu4.html