Ulaanbaatar's Chinggis Khaan International Airport is the main air gateway to Mongolia, a landlocked country wedged between Russia and China. That geography shapes your paperwork. A dummy ticket, also called an onward ticket, is a real PNR booked for visa or border-check purposes without paying for the flight. Here are five things to sort before you reach the gate.

1. Your gate agent asks before Mongolia does

You will most likely meet the question at the departure airport, not in Ulaanbaatar. Airlines don't want to fly you somewhere you can't enter, so check-in staff look at entry conditions in the industry database called Timatic, which IATA explains on its Timatic page. If the database says proof of onward travel might be needed, expect the question.

Don't wait for it. Check your own situation on the UK government's Mongolia entry requirements, or the equivalent page from your own government if you don't hold a British passport. Rules differ by nationality, and they change.

2. A train ticket isn't what the gate wants

Here's where Mongolia gets awkward. Plenty of visitors leave overland, by rail or road to Russia or China. That's a perfectly good plan. It's also a plan a check-in agent can't verify on a screen.

Airline staff are trained to look for a flight record. A paper train ticket, a vague "I'll take the train" or a half-finished route in your notes gives them nothing to check. If you intend to leave by land, think about carrying an air reservation as well, one that shows a departure from Mongolia within your permitted stay. Then your actual plan can stay flexible while your paperwork stays checkable.

3. Dates must tell one story

You might have a flight into Ulaanbaatar, a hotel booking, a visa or e-visa confirmation if one applies to you, and an onward reservation. Put them side by side. Do they agree?

The classic slip is a departure date that falls after your permitted stay ends, or a hotel check-out that doesn't match anything. Agents notice. Fix it before you leave home. Our breakdown of how a valid onward ticket fails at the gate lists the usual date and name mismatches.

Think about the order you show things, too. At the desk, the agent usually asks for the passport first, then the reservation. If you're fumbling through three apps to find the booking, you look unprepared, and unprepared looks suspicious. Open the PDF before you reach the front of the queue.

Carriers serving Ulaanbaatar include MIAT Mongolian Airlines and Korean Air, among others, and each applies its own check-in practice. Policies differ between airlines and between departure airports. So a smooth experience on one route tells you little about the next.

Names, too

The passenger name on the reservation has to match your passport. Not your nickname. Not your email handle.

4. A PNR isn't a seat

Think of a PNR as a record, not a guarantee. Airlines set time limits on unpaid reservations, and records can lapse or be cancelled before you travel. That doesn't make the record fake. It just means it has a lifetime.

Check it. Open the operating airline's manage-booking page with your booking reference and surname, once the day before and once on the way to the airport. If the airline's own site shows it, you're in good shape. For the mechanics behind this, read how GDS holds and PNRs work.

Short version: test early, test twice.

One more trap: a reservation that shows as "on hold" or "pending" on one screen and "confirmed" on another. If the status wording changes between the confirmation email and the airline's site, take the airline's site as the truth and screenshot it. A screenshot with the time visible beats a memory of what the page said.

5. Build your paper trail and a backup

Save the confirmation as a PDF on your phone, offline, and print a copy. Have your accommodation details to hand too. If an agent asks, you want to be able to answer in seconds.

Then plan a backup. If the agent isn't satisfied, what's your Plan B? Maybe it's a second reservation on a different route, or a call to the airline's helpline from the check-in queue. Decide now, not at the desk.

If you're travelling with someone, check both passports against both names. One typo on a shared booking can sink two people at once.

Be straight with whoever asks. Describe your real plans in plain words. Don't invent a story, and don't claim the booking is something it isn't. This is general information, not legal or immigration advice, and airline practice varies.

Sort these five and the gate becomes a formality. When you're set, book your onward reservation and check it against the list above.