This IS amex new accounts dept. If you applied for a new card or what to add an additional card member if you applied or received your card you might receive a verification call from 866-379-3643. I appreciate that level of double check since I have been a victim of ID fraud.

It's real. I applied for an AMEX card and they wanted to verify identity. I didn't call this number but used the AMEX customer service number and got transferred to new accounts so that I could be sure of who I was calling. They confirmed that they had called and that the code given was the theirs.

Received a call from this number claiming to be from American Express. I thought it was legit because I found what I thought was Amex contact information on a blog that came up in a search engine. This was probably posted by the scammers though.

When I called back thinking that it was a legitimate call from American Express (Amex) the woman did not know the reference number she left on my voice mail, which she mumbled in a East Indian accent, and immediately asked for my social security number. When I would not give my social she asked for my name. I eventually hung up since it was so sketchy. There was a beeping in the background like the phone call was being recorded as well. Since I have not applied for an Amex Cards I think this is a scam to steal personal info.

THIS IS A FRAUD!!!!!!!DON'T CALL, WORST CASE, IF YOU DID DON'T GIVE OUT AND INFO, DOB, SSN OR ANYTHING ELSE!!!

The agent who called me from the 3643 number was asking me to provide my social and DOB in order to verify an application I had submitted in the mail to Amex.  But how do I know if someone who is not really Amex stole my application in the mail and wants my info to commit fraud or identity theft? If you go to www.americanexpress.com and call any of their 800#'s (I called 800-223-2670), then there is no need to call 866-379-3643.   The reps at the 2670 number can assist you especially if you have a reference number from the alleged Amex rep who called you.  After speaking with the Amex rep at the 2670 number, it appears the 3643 number is legitimate, however, it is always safer to call any of the phone numbers the official website uses.  Better to be safe than sorry when it comes to giving your social security number, date of birth, etc., over the phone.    

Had a call from these folks.  The called my mom and left a number and extension.  Called left message with extension.  Her name was Aubry Aurback, ext 57852.  Checked with AMEX and they confirmed this was bogus.

This is from American Express. I just opened up a new account with them and they called my home number to verify

1-866-379-3643 is american express i just applied for the true earnings card from them you people are so paranoid if you go to there amex website there will be a customer service # its 1-800-528-4800 they can tell you the number is correct.

I got some call and requested some info, and when asked for a number to call back they gave this number. 866-379-3643. Went American Express web sint and called the Customer service number under contact-us to verify if the number is really an Ax. number.

Per Ax C.S. 866-379-3643 is <b>NOT</b> an american Express Number