"Dear passenger,
Thank you for your email.
Please be informed that we have changed the policy recently and passengers no longer need to show the credit card used to purchase the ticket. Therefore, authorization letter is not needed."
I was asked to show my credit card in both LHR and BKK ten days ago, both flight sectors were on the same itinerary! I did say I thought the policy had changed, but the agents didn't think so.
11277m.