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The passport was left on the train: how the person who finds it can let you know right away

Published 2026-11-14·4 min read·by AYA
Emil is on the train to the airport. He checks his papers one last time, puts his passport on the seat next to him and gets off at the right station. The passport stays behind.
Things forgotten on trains are not rare. According to DSB, the Danish state railway, it collects about 27,000 forgotten items a year, and about half find their way back to the owner (source: DSB, lost property page, November 2026). A forgotten passport is a special case: DSB hands it over to the police after four days. By then the trip is long gone.
What is missing is rarely an honest finder. It is a way for the finder to know who to tell, and to tell them quickly.

A small mark for your things

The security mark without register is a 50 x 25 mm QR sticker. You put it on things that can be forgotten but do not have their own serial number: a passport cover, a bag, a backpack, a folder with important papers or your child's pencil case.
There is no phone number and no address on the mark. When you activate it, you enter your own name and choose which item the mark is on. The finder sees the two together, for example "Sara's passport", so it is clear the item has an owner who is missing it.

How the passport gets home

  1. The finder scans the mark with their phone camera. No app or account is needed.
  2. The finder sees what has been found, for example "Emil's passport".
  3. The finder can share the place with one tap, call you or send a message with a photo through the page.
  4. You are notified right away as a notification on your phone and by email, and can agree where the passport can be picked up.
Your phone number is never shown. The location is only shared when the finder taps the button. Often you can collect the item before it even reaches a lost property office.

Why not just write your name and number?

You can, of course. But a phone number on a bag or passport cover is visible to everyone, all the time. And a name alone only helps if the finder bothers to look for you.
With the mark, the finder only has to scan. You are notified the moment it happens, and you decide how you arrange to meet.

For the whole family's things

The mark is useful anywhere things get forgotten:
  • Passports and travel documents on holiday, on the train and at the airport.
  • Bags and backpacks for school, training and work.
  • Children's things, such as the lunchbox, water bottle and pencil case that look like everyone else's in the class.
  • Sports gear and instrument cases forgotten in the changing room or on the bus.
If you have several marks, they are all in the app, where you can see where they have been scanned, share them with another adult and pause them.

With or without register?

AYA has two versions of the security mark. The version without register is for things without a serial number, as in the examples above. Phones, tablets, computers and bikes have their own serial number and need the security mark with AYA register, where the number also goes into a public lookup register. Suitcases and keys have their own products: the luggage tag and AYA Keychain.

Get started

  1. Put the mark on the item and scan it with your phone camera.
  2. Enter your own name and choose which item the mark is on.
  3. Add an email if your account does not have one, and activate the mark.

12 months or lifetime

The mark is valid for the period you buy. When you buy it, you choose 12 months, where the first year is included in the price and the mark can then be renewed once a year, or lifetime, where you pay once. If a 12 month mark expires, its QR functions are paused until you renew.
The current price in your currency is on the product page.

Small habits that help too

Check the seat before you get off. Keep your passport in the same place every time, for example in a zipped pocket. And take a photo of the passport's data page before you travel, so it is easier to get an emergency passport if the worst happens. The mark is for the times it goes wrong anyway, and a stranger is holding your things and would like to help.

Questions about the security mark without register

What does the finder see?

Your name together with the item, for example "Sara's passport", and buttons to share the place, call or write. Never your phone number.

Can I use the mark on my phone?

Things with a serial number, such as a phone, tablet or computer, need the security mark with AYA register. The mark without register is for things without a serial number.

How am I notified?

As a notification on your phone and by email, the moment someone scans the mark.

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