My legal signature looks different every time I sign. I'm not sure it's easy to copy, because I have a certain tail at the end that's not easy to replicate.
There was a fraud charge on my credit card, and American Express reversed the charge, cancelled my card, and sent me a new card.
I think this fraud under telephone number 4029357733
is now prevalent, and credit card companies know about them. If you see this number on your statement, call the credit card company immediately to have them reverse the charge.
There are many complaints about this charge that anyone can find on the internet. The list is very long.