Originally Posted by
notquiteaff
Does Amex have the ability to just block future charges from one merchant, without canceling the card and issuing a new number?
No -- any merchant can manually enter a valid AMEX and post a charge. I'm certainly not changing my number for 100 bucks in bogus Hertz charges. AMEX refunded all of them so far.
What seems unbelievable is that a "legitimate" company would think it acceptable to post a charge weeks after the original transaction. Two or three days, maybe. But anything past a week just stinks of scamster/ fraud.