Recently I noticed a charge on my American Express for $8100. I however never authreized or signed for this charge. I have delt with the company in the past and I am figureing they had my credit card on file. The company that charged my card stated that they had an invoice in my name with a signature. (not mine of course) I have contacted American Express regarding this issue and they are investigating the charge now. Any other thoughts. I am worried because the invoice is in my name. Any insight for me?

