I put the department on this case as the caller has been using a 'number disguise' device, and annoying people with his 'silence' when the call is answered.

Actual call came from 623-492-4000 but description said the call came from 602-537-9012.  Caller identified himself as from American Express and wanted to check up on services.  Asked if we had any concerns, questions, etc...  At one time he asked for the last 4 digits on the account which I declined to give him as I didn't trust that he was actually from AmEx.

Was called from 623-492-4000 on 5/6/13 at 2:02 PM Arizona time.  Caller identified himself as Josh with American Express.  He wanted to see if he could save me money and asked if I wanted to apply for the American Express card and earn rewards.  He said there were many incentives.  It sounded very convincing and I gave him my personal information.  After thinking about it I called the # back and the recording did claim to be American Express.  But when I called American Express from their website they said they had not placed the original call.

I was called by this number today with a man saying that he was from American Express and wanted information.  I didn't tell him anything and I called American Express.  Turns out it's a scam.  If anyone calls you and you have to give any personal info out - numbers, name, etc - don't.

I also received a call from 623-492-4000. He had information on my account and I hesitantly gave unrelated info. After feeling uneasy and calling the main Amex number from a different phone, I was able to confirm the caller does in fact work for Amex in the "Account Developer" department. However, you should still not give numbers or passwords to anyone who calls you.