I am planning a trip to Hong Kong in June. When I tried to book my return flight (a direct flight from HKG to SFO) on Singapore Airlines's website, it requires that I enter my passport information (number, expiration date, etc.). My passport is currently being renewed and I don't have this information yet, but I'm hoping to book the flight now while the fares are reasonably low. My friend, who booked the same flight, seems to be able to change his passport information for his booking without issue.

My question is: Can I just put in made-up information for now, and then enter in the real information when I get my new passport? What can go wrong?

  • My question differs slightly (I plan on giving the correct information eventually), but I think the information in the linked question answers my question. It sounds like it doesn't really matter, so I can proceed as planned and put in some made-up information for now. I guess I was just wondering if Singapore Airlines is going to do anything with my made-up passport number besides keep it on file. In any case, thanks!
    – nukeguy
    Apr 8, 2018 at 20:03
  • They do pass it to immigration in the US but it doesn't matter as those details would be updated anyway when you scan your passport at the boarding gate. Likewise US immigration doesn't care in the slightest about what you give to the airline.
    – JonathanReez
    Apr 8, 2018 at 20:07
  • Is the information really mandatory? Most such processes I know of either request those details at a later stage (after booking has been completed) and/or make it optional during the booking process. There may be a “skip” or “later” link not very visible somewhere on the page.
    – jcaron
    Apr 8, 2018 at 21:39
  • @jcaron "Is the information really mandatory?" -- That's my question. The Singapore Airlines website is forcing me to provide it, which is weird. It's a mandatory field in their application.
    – nukeguy
    Apr 8, 2018 at 22:40
  • @nukeguy that's a bit unusual at this stage in my experience. I recommend you don't put a random number in there, use something like "willprovidelater" instead for instance.
    – jcaron
    Apr 8, 2018 at 22:50