Originally Posted by Often1

1. Chase is refunding you the fee as a customer courtesy, so why bother with anything further?
2. IATA is an industry trade group, has no authority to order anything, and it's policies are supplanted by US law in any event.

When the downstream carrier does not do business in the US, this is a mess because DOT does not have a hook and neither do you. On the other hand, when the downstream carrier does business here, it is easy enough to pursue if necessary.

If you wish, you could file a complaint with DOT because the downstream carrier, which does business in the US, failed to follow US law, but the likelihood of DOT doing anything that matters is close to zero in this instance.

I will be interested to see whether Chase does come through once it realizes that it has no way to proceed to recoup.