I purchased a ticket on aa through the "thank you point" system Citibank runs. When I printed my itn, it did not show the price, only the last 4 digits of the associated cc. For various reasons, I needed a p/o showing the actual price the ticket was purchased for--aa.com support directed me to the web address in the title, after you enter the ticket number (not locator) and your last name, it gives details of the flight and the price. For some tickets, this is a way of cancelling if you choose to continue.
This info may be of use to FT readers.