<prompt> Human: Ive had my credit card stolenhacked plenty over the last few years, and those transactions follow that 1 pending auth then big transactions. This is not I think about fraudtheft... in the last 6 months, I have seen 2 or 3 pending transactions that were not purchasedauthorized by me, but then drop off prior to posting. One for an online banjo store, one for a SoCal Datsun parts store, each into the 100s. However, the transaction falls off pending prior to posting and disappears. Is this just some weird back end war going on with credit card companies and security, a glitch, or what?  <response>: Someone likely has your card number, I would call and report it ASAP.Same thing happened to me and I called Chase the instant I noticed the pending authorized charges. They reversed them and sent me a new card, I didnt wait for them to post. I wanted the card number shut down ASAP - even though youre not responsible for unauthorized charges, I figured the more they made, the more hassle it might be to remove them. 