An American Express Financial Review usually consists of nothing more than signing and returning an IRS form 4056-T which allows them to access a "transcript" of your tax return. Typically American Express is not much interested in your business, only in your personal ability to pay. Business cards extend credit to you, not directly to your business.
In any event, this is a routine request which shouldn't trigger any questions unless there is something else.
Thanks for the explaination. I will give them a call.