Why Does it Work?
Mainly for two reasons:
First, because the great majority of people is eager to help, and to get back the found objects to their owner.
Second, because it is easy for people to get in touch with the owner, once they have spotted the web URL on the found object.
How Much does it cost?
For short: €5.00 a year. See the FAQ for more details.
How to Mark your Belongings?
With a permanent marker.
This is by far the easiest way for things like clothings, bags, comforters… It however has the disadvantage of not looking so great on valuable items.
An intermediate solution between permanent marker and engraving. But you need to make or buy some stickers. See the FAQ about the buying of stickers or label printer.
With textile labels.
Certainly the best choice for clothings, as you may sew or stick labels on all of them. See the FAQ about the reuse of the same ID for several objects.
This is the more permanent way to mark your valuable belongings. You can go to the nearest key cutter and shoe repair shop to ask for engraving your object.
One of my Object Has Been Found!
The person who has found the object will recognize the ID as being an URL, and by typing it in an internet browser will be able to contact you and to organize the giving back of your belonging.
I Have Found an Object!
You shall type the full internet address (URL) which is normally written on the found object, in your browser address bar. If it doesn't work, you may type the object ID (last part of the URL after the '/') in the appropriate form.