Beware of this phishing email 'from' American Express - do not click the links, ithey will take you to a fake version of the American Express website, which scammers will use to trick you into giving away your personal information.
The email reads as follows:
We are writing to you because we need to speak with you regarding a security concern on your account. Our records indicate that you recently used your American Express card on November 05, 2015.
For your security, new charges on the accounts listed above may be declined. If applicable, you should advise any Additional Card Member(s) on your account that their new charges may also be declined.
To safeguard your account, please access your account here.
American Express Customer Service Department
The links in the email point to srv2-americanexpress.com, a fake, phishing website.