I've gotten 5 calls from them today. I haven't answered, but have a bunch of 'please wait for an important message...click!' voicemails. I hate these random calls.

206-225-8231

I got a call from this number asking to call 1-800-678-0738 back for an important matter from AMX by end of the day. It's an scam, look up that 1-800 number.

Received the same thing today.... I have turned this over to the NASA inspector general for further action... It appears that they must be using a forwarding system of some kind... We have so far traced the 206 (Seatle) to Florida, to Ala, to PA... They are still working it... Do not be fooled!  If you get a call from 206/225-8231 or 800-678-0738, it is not real!!  A general rule: if you suspect it is not right, do not do it!  And, in general, they should ask to verify the last 4 digits only of your card, not the entire number...

It is American Express trying to inform you that your account is past due.