Booked a trip for my young daughter from Osaka to Vancouver months in advance and purchased an extra check-in bag. Trip.com mailed me the night before departure saying that the extra bag 'request' could not be approved, but we could try and work things out ourselves at the airport. Brutal! Why wait months to tell me the extra bag was not a sure thing, especially after having booked and paid for it? Now we are stuck and spending our last night in a rush of phonecalls and chatbots with the airline trying to purchase an extra bag. Use Expedia (or anything else!) instead. Never again.