Usually if I see things on the card, I see the time and place, and I can put myeslf back to that and it’s not a problem.
I have heard that also, @chyna that they charge a few dollars and see if it goes through. With my cc company emailing me for every charge where the card is not present, it gives me the opportunity to catch it right away and stop the card or dispute it. I have only had it happen once, and it was a Microsoft charge and I called the cc company to dispute. They said it was better to cancel and dispute than to just dispute, given those circumstances, so I did.
Once, a long time ago, like 20 years ago, I used to receive Sports Illustrated in the mail. I hadn’t signed up for it so I thought maybe it was free for some reason, like a bonus from another subscription or something. Then I looked at some old credit card bills and saw the charge for it. I called my cc company and apparently, when I signed up for something “free” at Yankee Stadium, where I got a free Yankees blanket, it came with an automatic subscription (and charge) for Sports Illustrated. I called my cc company right away, even though the subscription was something that I inadvertently signed up for about 6 months prior, and the cc company took the charge off my card.