Originally Posted by
SK AAR
You will not be able to look up tickets booked with third party like Exp on the TK webpage. It doesn't mean that there is something wrong with your booking or ticket and most likely you will be able to travel.
You can definitely look up third-party bookings on the TK website as long as you use the 13-digit ticket number. Just tried it myself for one of my bookings via Amex Travel.