I have been getting a number of these, but thought this one was more amusingly blatant than most:

Dear American Express Customer,

During our regular update and verification of the Customer Accounts, we could not verify your current information. Either your information has been changed or incomplete, as a result your access to use our services has been limited. Please update your information.

To update your account information and start using our services please click on the link below:

[address deleted]

AFTER SUBMITTING, PLEASE DO NOT ACCESS YOUR AMERICAN EXPRESS ACCOUNT FOR THE NEXT 48 HOURS UNTIL THE VERIFICATION PROCESS ENDS.

Note: Requests for information will be initiated by American Express Business Development; this process cannot be externally requested through Customer Support.

Sincerely,
AmericanExpress
Security Department.

In other words, give me the key to the vault and don't come around the bank for a couple of days.