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The cc companies need to have a way to issue a temporary card for use in a given time period, like a trip, vacation, conference, whatever. That way, you could use that and then it would expire at the end of the time period and the number could not be used again. They already offer temp numbers for a single purchase but it should be expanded a bit. It would stop a lot of fraud. Of course, everyone would be too lazy to use it so I suppose they thought about it and discarded the idea.
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