Well. I've searched all my pockets off all the pants I've worn the past week, I sorted back thru all my pending laundry, I've disassembled my geek jacket (and those of you who know about that jacket are sure to be impressed, I've unloaded my backpack, I've checked every nook, cranny and crevasse in my car, I've checked every piece of paper on my desk, I've excavated my garbage, I've stripped my bed, and I checked with the manager of the last store that I last physically used it.
FORTUNATELY, checking the unbilled activity log on the card's website, and then checking the pending charges with their TSR, nobody is using it.
But still, I had them kill the card and send me a new one.
Bother. It's been over 3 years since I had to have a card killed.