A lady called me representing herself as an AT&T employee telling me about a fraudulent company tried to subscribe me for a long distance service.  After providing me information about my account, she said that in order for this not to happen again that I should put a third party block.  She sent me an e-mail at the same time I was talking on the phone with her.  She said to reply by sending an attached letter on the e-mail so she can process the third party block order.  I told her that this is unusual for this type of call.  Later she stated that she work with a company that works with At&t and that I will be able to see the letterhead that says "At&t".  She was right I saw at&t on the letterhead but ooking at the possibilities of a scam, I decided to call At&t to get more information.  I look for their company and nothing was found and her number was not listed.  My phone's caller ID showed "450-0".  This people are very good but no as good.