This is a published benefit of the Platinum Card, although they have the option to provide most of it in travelers cheques..

You can use your Card to cash personal cheques at more than 1,700 American Express Travel Services locations, up to $10,000 per account every 30 days. For each transaction, you may obtain up to $500 in cash and the balance in American Express Travelers Cheques. (Not all services available at all locations and all services are subject to local laws and cash availability.) For information, call 800-525-3355. Outside the U.S., call 954-473-2123.

However, I do not understand the reason for the $15 fee from Chase. Is it for clearing a check presented in a foreign country or for replacing the ATM card or...?